Abhilash Suryan

Abhilash Suryan
College of Engineering Trivandrum | cet · Department of Mechanical Engineering

PhD

About

86
Publications
12,951
Reads
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399
Citations
Introduction
Abhilash Suryan works at the Department of Mechanical Engineering, College of Engineering Trivandrum. His current areas of interest include Aerospace Engineering, Gas Dynamics, Renewable Energy and Engineering Pedagogy. Web of Science ResearcherID: I-5624-2015 ORCID 0000-0002-3669-4361 Scopus Author ID: 36487403100
Additional affiliations
February 2014 - present
College of Engineering Trivandrum
Position
  • Professor (Assistant)
June 2012 - January 2014
Government Engineering College, Idukki (GECI)
Position
  • Professor (Assistant)
June 2008 - February 2012
Andong National University - Daejoo Machinery Collaborative Research Centre
Position
  • Engineer
Education
June 2008 - March 2012
Andong National University
Field of study
  • Gas Dynamics
June 1996 - December 1997
College of Engineering Trivandrum
Field of study
  • Propulsion Engineering
October 1991 - October 1995
College of Engineering Trivandrum
Field of study
  • Mechanical Engineering

Publications

Publications (86)
Article
Full-text available
The combustion occurs at supersonic velocities in a scramjet engine. Since the mixing and combustion take place at high velocities, analyzing the mixing of air and fuel in the engine is of great interest for many researchers. In the present study, two passive struts are placed at a short distance downstream of the fuel injection strut. The effect o...
Article
Full-text available
The need to develop sustainable strategies and solutions to design and retrofit buildings to be comfortable living environments that reduce energy and resource consumption is crucial in achieving the sustainable development goals put forth by the United Nations. This is the motivation for professionals to develop alternative approaches for problem-...
Article
Full-text available
At low altitudes during rocket flight, the atmospheric pressure is higher compared to the design pressure of the nozzle at the exit. This leads to the formation of overexpansion shock, and consequently, flow separation. When the separation is asymmetric, the lateral force acts on the nozzle wall, and the magnitude of the lateral force depends on th...
Article
In a world where great efforts are being made to reduce carbon emissions and pollution, electric vehicles are becoming more appealing. Vehicles based on internal combustion engines are slowly being phased out and electric or hybrid vehicles are replacing them. Batteries being the primary power source of these vehicles, an effective battery thermal...
Article
The study focused on the development of a three-dimensional computational model for water spray cooling of photovoltaic panels. A water spray cooling technique can ensure performance improvement due to a reduction in panel operating temperatures due to its self-cleaning effect. The model was used to estimate the optimal amount of overall water util...
Article
Wet compression has been well known as a promising technology to effectively increase the power output of the gas turbine engine by introducing fine droplets of water into the compressor stages. This lessens the temperature rise throughout the compression process of gas, thus leading to the reduction in the compressor work. A considerable amount of...
Article
The performance of renewable energy systems can be significantly improved if power is produced from low‐temperature heat sources. The organic Rankine cycle (ORC) is suitable for producing power from low‐temperature heat sources. ORC finds applications alongside solar power, geothermal power, waste heat and biomass. ORC‐enabled systems can contribut...
Article
The share of renewables in global energy production has grown steadily for the last few decades. The oil crisis of the 1970s forced the developed countries to search for alternatives to fossil fuels and later the global warming and climate change warning accelerated these efforts worldwide. Being the world's third-largest consumer of oil and electr...
Article
A case study of assessing wind power generation potentials for seven locations in a district of India is presented in the paper with special focus on small wind turbines with low cut in speeds operating in hybrid complementary mode with a hydrogen generation system. The major motivation for the study is to accelerate the efforts for the region towa...
Article
In a Supersonic combustion ramjet (Scramjet) engine, combustion occurs at supersonic velocity as incoming air remains supersonic. Scramjet engines have complex flow phenomena taking place inside the combustor. In a scramjet combustor, mixing and combustion should take place within few milliseconds. In the present study, two additional trailing stru...
Article
A dual bell nozzle (DBN) consists of two bell nozzles of different geometric area ratios attached at the region called inflection. This distinct geometry modification allows the nozzle to adapt to altitudes through its different operating modes. A numerical investigation with hot flow is done on a 2-dimensional axisymmetric model of a DBN having co...
Article
A linear aerospike nozzle is a kind of altitude adaptive nozzle that has optimum performance over the entire operational range. In this work, flow characteristics of a linear plug nozzle and a truncated plug with 40% plug length are studied numerically. Different flow types associated with an increase in nozzle pressure ratio, corresponding wall pr...
Article
The flow field in an axisymmetric supersonic mixed-compression inlet is numerically solved to understand the separation bubble dynamics at different freestream Mach numbers of M∞ = 2.0, 3.0, 5.0, and throttling ratios of ψ = 0.515, 0.40, and 0.35. The two-dimensional compressible Reynolds Averaged Navier Stokes equations were solved in a finite vol...
Chapter
A dual-bell nozzle comes under the classification of an altitude compensating nozzle. The absence of any moving parts makes the dual-bell nozzle a better substitute for the existing bell-shaped nozzles. In this study, a numerical simulation is carried out on a 2D axisymmetric dual-bell nozzle model to find the nozzle wall pressure distribution at d...
Chapter
Cavitation in the flow passages of plain orifice injector affects both internal flow and jet characteristics. Cavitation occurs in flow passages of liquid engine injectors when static pressure falls below the vapor pressure at that temperature. Injector elements having narrow flow passages are more susceptible to cavitation. The flow rate through t...
Article
APJ Abdul Kalam Technological University in Kerala was founded in the year 2014. The University has introduced many path breaking initiatives for modernizing and upgrading technical education in Kerala. Extensive consultations were held for the preparation of the new curriculum for the University with various stake holders including eminent academi...
Article
The double divergent nozzle is a type of altitude adaptive nozzle. The double divergent nozzle does not have any mechanical parts, leading to reduced nozzle weight and requires minimum modifications to the existing launch system. The planar double divergent nozzle is a type of double divergent nozzle, having a rectangular cross section. The present...
Article
Injector elements having narrow flow passages are more susceptible to cavitation. It is important to understand cavitation phenomena occurring inside the injector flow passage as it can lead to fluctuation in propellant flow rate in the combustion chamber. The focus of the present work is to investigate the cavitation phenomena occurring inside the...
Article
Supersonic combustion ramjet (scramjet) is a variant of ramjet in which the combustion takes place at supersonic velocity. The flow physics inside the scramjet combustor is quite complex due to the fact that the mixing and completion of the combustion take place in a short time, which is of the order of milliseconds. This study focuses on flow char...
Article
Rocket nozzles accelerate combustion products or high pressure gases to supersonic/hypersonic velocities. The planar nozzles have rectangular cross-sections. At low altitude, the ambient pressure is higher than the exiting jet pressure, which leads to flow separation from the nozzle wall. In planar nozzles, asymmetric flow separation can be observe...
Article
Flap over blunt asymmetric reentry vehicles improves the aerodynamic stability and control. The present study has focused on the reentry aerodynamics of blunt-nosed conical body with flap configurations. Three dimensional, steady, viscous and compressible flow over the reentry body configurations were numerically analyzed by solving Reynolds averag...
Article
Altitude compensating nozzles provide optimum performance over a wide range of altitudes. The planar expansion–deflection nozzle is one such nozzle. It has a rectangular cross-section, and altitude compensation is achieved by incorporating a pintle beyond the throat of a conventional convergent–divergent nozzle. The objective of the present Paper i...
Article
Full-text available
The refrigerator unit based on electrically driven vapor compression technology consumes high energy, associated with high cost and loss of ecosystem. Recently, solar thermal energy emerges as a key research area and introducing it in refrigerator application has happened extremely fast. Solar thermal refrigeration systems based on ejector compress...
Chapter
Shear-induced blood damage is a prominent failure mode in cardiovascular devices. This failure mode results from structural and/or functional damage of formed elements of blood like red blood cells, platelets, white blood cells, etc., due to exposure in an environment where shear stresses are relatively high. Simplified models are required to allow...
Book
This book presents a collection of the best papers from the Seventh Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF7 2018), which was held in Trivandrum, India, in November 2018. The papers highlight research outputs from India, China, Japan, Korea and Bangladesh, and many of them report on collaborative efforts by researchers from t...
Article
Full-text available
For technological advancements to trickle down to the downtrodden and differently abled sections of society, it is necessary that academic institutions take up socially relevant projects directly impacting the community around them. Getting to know the needs of the community around them and attempting the solutions for the problems, presents the en...
Article
Full-text available
Rapid strides made in technological advancements call for a paradigm shift in engineering education. Disruptive engineering education involves identifying problems and finding solutions through unconventional, out of the box, methods. This approach requires simplicity, convenience, accessibility and affordability for sustainable development. The ro...
Conference Paper
Full-text available
Planar double divergent nozzle (DDN) is a type of altitude adaptive nozzle, having a rectangular cross section. The present study involved the numerical analysis of a single divergent nozzle, and two double divergent nozzles were employing computational fluid dynamics method using commercial software ANSYS Fluent. The flow is simulated on two doubl...
Conference Paper
Full-text available
Planar Expansion-Deflection (ED) nozzle is a type of altitude compensating nozzle, with rectangular cross-section, which employs a pintle placed beyond the throat of a conventional convergent-divergent nozzle. The present study aims to analyse the effects of pintle shape on the flow in a planar ED nozzle, employing computational fluid dynamics meth...
Conference Paper
Double Divergent Nozzle is a type of altitude compensating nozzle having less weight and minimum modifications when compared to other altitude compensating nozzle concepts. Planar double divergent nozzle is similar to a dual bell nozzle but, it is having a rectangular cross section. The present study involves numerical analysis of a planar double d...
Conference Paper
Bends are essential components of fluid flow systems, facilitating compact, light weight designs. But they can also be the cause of complex secondary flows, losses and variable heat transfer rates in the fluid flow lines. Nature of flow within pipe bends for unsteady, incompressible viscous fluids are well known. The secondary flow and separation i...
Conference Paper
The present work explains sloshing behavior and flow dynamics in a cylindrical container of 300mm diameter and 500mm height, for different baffle arrangements. Numerical simulations are done in ANSYS with water and air as the fluids to optimize the position of the baffle. A forced sinusoidal motion is provided for the excitation of the tank. The si...
Article
Ensuring uniform addition of coloring material to the fabric is an essential requirement in the textile dyeing process. Beam dyeing machine consists of a special beam, the barrel of which is evenly perforated with holes. The dye liquor is forced into the fabric material through this beam. For uniform fabric coloring, an equal distribution of the dy...
Article
The pipe bends are common elements in pipeline network of mechanical systems. The losses in pipes and bend are generally considered as insignificant and unavoidable. The recent trends in achieving a higher order of performance in machines led to optimization by reduction in minor energy losses. The usage of components with the higher surface finish...
Article
Full-text available
Conical plug nozzle and truncated conical plug nozzle are advanced rocket nozzles suitable for use as altitude compensating nozzles. In this study flow through the conical plug and truncated conical plug nozzles are numerically simulated to first validate with experimental data and then to compare the performance when a base bleed is introduced. Th...
Article
Conical aerospike nozzles are advanced rocket nozzles suitable for altitude compensation. A spike nozzle has geometry that resembles a conventional bell nozzle turned inside out. Lack of a solid outer surface ensures the variation of gas expansion to match the prevailing atmospheric pressure at different altitudes. This study focuses on flow charac...
Book
Full-text available
This book is the Proceedings of the 7th Asian Joint Workshop on Thermophysics and Fluid Science
Chapter
Full-text available
The need for more speed for hypersonic aviation, reentry, and rocket propulsion vehicles increases as the quest for space and planetary exploration increases; improved materials are needed to withstand the conditions encountered by wing leading edges and propulsion system components in hypersonic aerospace vehicles as well as the extreme conditions...
Chapter
Environmental pollution, global warming, and depletion of fossil fuels compel radical changes in automotive engine technologies in directions that offer both the potential for achieving near-zero emissions of pollutants and greenhouse gases and a diversification of the transport fuel system away from its present exclusive dependence on fossil fuels...
Chapter
In large air compressor installations consisting of multiple compressors operating continuously, even a small reduction in the inlet air temperature can improve the plant efficiency. Exergy efficiency is more rational than energy efficiency, and exergy analysis is more helpful than energy analysis for locating and evaluating available energy-saving...
Chapter
Coriolis flow meters are widely used in hydrogen flow measurements. The low molecular weight and low density makes it difficult for conventional techniques to measure hydrogen flow. Many researchers have worked on the FE analysis of Coriolis mass flow meter. Here, a three-node Timoshenko beam element is formulated to model the curved pipe conveying...
Chapter
In this study, a multiphase CFD method is used to analyse fluid flow in a screw pump which rotates at very high angular velocity under cavitating conditions. This model utilizes a homogeneous phase approach, based on volume-scalar-equations and a truncated Rayleigh-Plesset equation for bubble dynamics. The model is implemented in the CFD software C...
Article
Numerical analysis is performed on a dual bell nozzle designed for an experimental semi-cryogenic rocket engine application to predict the effect of film injection on nozzle flow characteristics and transitional behavior. Both start-up and high-altitude operation regimes are simulated to predict actual flight conditions of a dual bell nozzle. Coola...
Article
Aerospike nozzles are advanced rocket nozzles that can maintain its aerodynamic efficiency over a wide range of altitudes. It belongs to class of altitude compensating nozzles. A vehicle with an aerospike nozzle uses less fuel at low altitudes due to its altitude adaptability, where most missions have the greatest need for thrust. Aerospike nozzles...
Article
Boundary layer separation over an airfoil causes large energy losses and strong adverse pressure gradients. This in turn leads to a reduction in the lift force and an increase in the drag force. Therefore delaying or if possible, eliminating the flow separation is mandatory. The elimination of flow separation would permit higher angles of attack fo...
Article
Fluid flow in a screw pump which rotates at very high angular velocity is numerically analyzed. In the present study, fluid flow in screw pumps under high Reynolds number, of the order of 10⁵, is considered. Screw pump has two major elements, a plain shroud which is a stationary element and a rotating hub with helical grooves contained within the s...
Article
Full-text available
The study of the migration characteristics of turbulent jets has become relevant as they are used in a variety of engineering devices and are encountered in combustion, chemical processes, and processes involving cooling, mixing, and drying. In several applications, especially in the case of hot streaks in gas turbines, the knowledge of mixing phen...
Article
Full-text available
Hypersonic vehicles when moving at very high speeds experience the problem of drag and heating. One of the ways to reduce this drag and heating is by the use of an aerospike. In the present study, the flow around a blunted body fitted with an aerospike is analyzed using a commercial software ANSYS Fluent and an open source Direct Simulation Monte C...
Article
Wet compression systems increase the useful power output of a gas turbine by reducing the compressor work through the reduction of air temperature inside the compressor. The actual wet compression process differs from the conventional single phase compression process due to the presence of latent heat component being absorbed by the evaporating wat...
Conference Paper
Full-text available
Flow behaviour and cooling effectiveness in a dual-bell nozzle with supersonic injection of gas film is investigated with numerical simulation in the present study. The gaseous nitrogen is injected near the inflection point to cool the extension nozzle wall. Effect of film injection on flow transition during the ascent of flight is also studied. Di...
Conference Paper
A numerical study is carried out to understand the changes in flow behaviour and flow separation in a dual-bell nozzle due to secondary injection. Effect of different coolant parameters on nozzle flow characteristics are studied with the injector located at upstream of the inflection. The paper also tries to put some light on flow separation in a d...
Conference Paper
Full-text available
A numerical study is carried out to understand the changes in flow behaviour and flow separation in a dual-bell nozzle due to secondary injection. Effect of different coolant parameters on nozzle flow characteristics are studied with the injector located at upstream of the inflection. The paper also tries to put some light on flow separation in a d...
Conference Paper
Full-text available
An alternative to conventional type nozzles, dual bell nozzle (DBN) provides better performance across altitude range and widely accepted over other altitude compensating nozzle for its simple design and ease of manufacturing. DBN is designed such that the flow is forced to separate at an inflection point at sea-level operation and full flowing to...
Conference Paper
Full-text available
Dual bell nozzle (DBN) is a promising technology for Unified Launch Vehicle (ULV) or Reusable Launch Vehicle (RLV) since it offers better performance across a wide range of altitudes, its simple design, and ease of manufacturing. In the present study, a numerical simulation is performed to ascertain the effect of supersonic film cooling through coo...
Article
Aerodynamic drag, as a result of the high surface pressure generated because of the formation of a bow shock in front of a blunt nose cone of a hypersonic vehicle, is a serious problem. An aerospike can be attached to the stagnation point of the blunt nose cone to achieve a large reduction in drag and heat load at very high speeds in supersonic or...
Conference Paper
Full-text available
In a typical compressor-turbine cycle, the majority of the output power from the turbine is consumed for the operation of the compressor. In order to obtain higher output from turbines, certain techniques are employed to reduce compressor work. It is known that the compressor work increases continually with the increase in temperature of the operat...
Article
In spite of the high material quality-of-life indicators on par with some of the developed nations, Kerala's industrial climate has been stagnating for the past several years. There is a significant rise in the number of students graduating from the state's technical institutions. It is high time, that earnest efforts are made to bring to practice...
Conference Paper
Full-text available
High speed flow past a blunt body generates a detached bow shock which leads to a high surface pressure and as a result the development of a high aerodynamic drag. One of the ways to reduce drag and heat flux is the employment of an aerospike. Flow under consideration occurs at rarefied conditions. In the present study, the flow around a blunted bo...
Article
A three node C-0 continuous isoparametric beam element is formulated to model the curved pipe conveying fluid in three dimensional configuration. The equations of motion for the combined structure and fluid domain including added mass effect, Coriolis effect, centrifugal effect and the effect of pressure on the walls of pipe have been developed by...