Jonathan C. Gladin

Jonathan C. Gladin
Georgia Institute of Technology | GT · School of Aerospace Engineering

PhD

About

43
Publications
3,959
Reads
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203
Citations
Citations since 2016
37 Research Items
174 Citations
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Introduction
Jonathan C. Gladin currently works at the School of Aerospace Engineering, Georgia Institute of Technology. Jonathan does research in Mechanical Engineering, Aeronautical Engineering and Aerospace Engineering. Their most recent publication is 'Fundamentals of Parallel Hybrid Turbofan Mission Analysis with Application to the Electrically Variable Engine'.

Publications

Publications (43)
Chapter
What are the benefits of electrified propulsion for large aircraft? What technology advancements are required to realize these benefits? How can the aerospace industry transition from today's technologies to state-of-the-art electrified systems? Learn the answers with this multidisciplinary text, combining expertise from leading researchers in elec...
Conference Paper
Full-text available
The mission reliability of a six-passenger quadcopter concept for urban air transportation is estimated using the dynamic event tree (DET) approach. The flight and powertrain dynamics were simulated by a MATLAB model which also models the possible vehicle-level responses to perturbations and fault conditions. The state of the vehicle before the per...
Conference Paper
Full-text available
Urban Air Mobility (UAM) concepts of operations often rely on novel vertical lift configurations featuring Distributed Electric Propulsion (DEP) and Hybrid Electric Powertrains (HEP). Several variants of these configurations exist and several quadcopters configurations are retained to assess the impact of propulsion architecture design choices on t...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2021-3285.vid This paper introduces a dynamic simulation environment developed for novel multi-copter aircraft architectures. The development is motivated by the need to better understand the safety implications of architectural design choices and to provide a formal reliability assessment framewor...
Conference Paper
Full-text available
View Video Presentation: https://doi.org/10.2514/6.2021-3289.vid Distributed propulsion systems are enabled by electrified aircraft and can provide aero-propulsive benefits. The magnitude and impact of these benefits rely on the location of propulsors on the vehicle, the amount of propulsive force generated by those propulsors, vehicle geometry, an...
Article
The design of an aircraft thermal management system (TMS) that is capable of rejecting heat loads into the bypass stream of a typical low-bypass ratio turbofan engine, or a ram-air stream, is investigated. The TMS consists of an air cycle system, similar to the typical air cycle machines used on current aircraft, both military and commercial. This...
Conference Paper
The design of an aircraft thermal management system (TMS) that is capable of rejecting heat loads into the bypass stream of a typical low-bypass ratio turbofan engine, or a ram-air stream, is investigated. The TMS consists of an air cycle system (ACS), which is similar to the typical air cycle machines (ACMs) used on current aircraft, both military...
Technical Report
Full-text available
The primary objective of this research effort is to identify failure modes and hazards associated with several configurations of multicopter concept vehicles supplied by NASA. Functional hazard analyses (FHA) and failure modes and effects criticality analyses (FMECA) are performed for each of the eight vehicle configurations under review. Conceptua...
Technical Report
Full-text available
The primary objective of this research effort is to identify failure modes and hazards associated with several configurations of multicopter concept vehicles supplied by NASA. Functional hazard analyses (FHA) and failure modes and effects criticality analyses (FMECA) are performed for each of the eight vehicle configurations under review. Conceptua...
Conference Paper
Full-text available
The aviation industry relies on a diverse set of objectives to operate at optimal efficiency and profitability. Two of these objectives include reducing emissions and generating optimal flight trajectories. There is increasing interest in aircraft hybridization to address emissions due to its potential to meet future environmental goals. The primar...
Conference Paper
The aircraft thermal management system functions to provide suitable working conditions for pilot, crew, passengers, and the other aircraft systems. The additional weight, drag and power consumption caused by it greatly influences the performance of the aircraft. However, due to rising heat load of emerging novel aircraft concepts, traditional desi...
Conference Paper
Full-text available
Electrified propulsion systems can provide potential environmental and performance benefits for future aircraft. The choice of the right propulsion architecture and the power management strategy depends on a number of factors, the airframe, electrification objectives and metrics of interest being the most critical ones. Therefore, the generic advan...
Conference Paper
In typical multidisciplinary design optimization problems, with varying missions, aerodynamic data, engine data, Thermal Management Systems (TMS), and other parameters it can take upwards of millions of runs to cover the full design space which result in extremely large computational burden, reducing the effectiveness of the design process. The obj...
Conference Paper
Boundary Layer Ingestion (BLI) appears to be a promising solution to meet aggressive aviation fuel burn and environmental goals defined by NASA and other entities. Propulsion-airframe integration plays a critical role in BLI vehicle design given the strong coupling between the airframe and the propulsion system. Several studies have focused on flow...
Conference Paper
The concept of boundary layer ingestion has been explored and studied for a long time to meet the increasingly aggressive goals to reduce mission fuel burn, emissions, and noise for aviation transportation. However, most of the previous studies trying to analyze the benefits brought by this concept, or to design propulsion systems specifically for...
Conference Paper
Full-text available
In recent years, NASA has been actively pushing for electric aircraft to reduce fuel burn,carbon emissions and noise. However, the current battery technology prevents fully battery-driven aircraft from becoming a reality in the near future. As a stepping- stone towards thisinitiative, hybrid-electric and turbo-electric aircraft are being researched...
Conference Paper
Efforts to achieve NASA’s N+2 and N+3 fuel burn goals have led to various future aircraft concepts. A commonality in all these concepts is the presence of a high degree of interaction among the various disciplines involved. A tightly integrated propulsion/airframe results in distortion in the flow field around the engine annulus. Although beneficia...
Conference Paper
Diesel engines can provide great improvement in fuel consumption, reliability, and emissions compared to gasoline engines. However, to overcome the influence of low density air at high altitude, installation of an intake compression system is required. Existing literature rarely shows guidelines on supercharger or turbocharger architecture modeling...
Conference Paper
Renewable energy sources have become increasingly popular in recent times due to their ability to provide energy whilst lowering overall emissions which results in a more environmentally-friendly design. Two concepts that are being pursued are fully electric vehicles (EVs) and hybrid electric vehicles (HEVs). Hybrid electric systems seek to balance...
Conference Paper
Boundary layer ingesting inlets for hybrid wing body aircraft have been investigated at some depth in recent years due to the theoretical potential for fuel burn savings. Such savings derive from the ingestion of a portion of the low momentum wake into the propulsor to reenergize the flow, thus yielding total power savings and reducing required blo...
Conference Paper
The design of advanced aircraft that simultaneously meet increasingly strict noise, emissions, and fuel burn requirements will require accurate analysis of propulsion-airframe integration effects even at the conceptual design level. To meet this requirement, there is a need for new, easy-to-use parametric-based geometry and modeling analysis method...
Conference Paper
The concept of boundary layer ingestion is an aircraft propulsion system arrangement that takes advantage of the local boundary layer at the point of intake to ingest some of the vehicle's low momentum flow and re-energize it thereby reducing total power required of the vehicle. The difficulty, however, comes from the tradeoff between the amount of...
Conference Paper
A methodology for analyzing the boundary layer ingestion technology on a hybrid wing body aircraft has been developed using a simplified boundary layer analysis based on computation fluid dynamic results. With certain assumptions, a method for calculating the boundary layer velocity profiles across the flight envelope was shown using a log-wake vel...
Conference Paper
This paper presents an engine sizing and cycle selection study of ultra high bypass ratio engines applied to a subsonic commercial aircraft in the N+2 (2020) timeframe. NASA has created the Environmentally Responsible Aviation (ERA) project to serve as a technology transition bridge between fundamental research (TRL 1–4) and potential users (TRL 7)...

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