Eduardo Trifoni

Australian National University | ANU · Research School of Astronomy & Astrophysics

View Video Presentation: https://doi.org/10.2514/6.2021-3352.vid A student rocketry team at the Australian National University has the goal of launching a liquid bio-fuel rocket to an altitude of 100km. The reference design for the launch vehicle calls for a propellant mass of 80-100kg, and a pressure fed propulsion system producing a thrust of 5-1...

View Video Presentation: https://doi.org/10.2514/6.2021-3359.vid In this paper a rocket engine thrust chamber is designed and simulated for additive manufacture in aluminium. The design process is guided by the development of a numerical model for heat transfer of a regenerative and film cooled nozzle wall. Results are presented for a LOX/ethanol f...

A test campaign was performed in the GHIBLI arc jet facility in the framework of the European funded LIGHT-TPS project, devoted to research and development of Ultra-High Temperature Ceramic (UHTC) coatings on Ceramic Matrix Composites (CMC) for super lightweight Thermal Protection Systems (TPS) of space re-entry vehicles. Two UHTC coatings made of...

A facility characterization test campaign was performed for NASA in SCIROCCO Plasma Wind Tunnel, with increasing enthalpy and constant reservoir pressure. In the frame of numerical rebuilding of the experimental data, an important gap among measured and numerically predicted values of heat flux led to deep analyse the numerical methods and the mode...

This article deals with the aerothermodynamic analyses of the hypersonic diffuser of GHIBLI Plasma Wind Tunnel at CIRA (Centro Italiano Ricerche Aerospaziali). This diffuser presented an unexpected behavior not ensuring nozzle under-expanded flow in test chamber, even in several free jet conditions. This experimental evidence was investigated follo...

The numerical analysis represents a powerful instrument to support experimentation, both in the preliminary stage and in the post-processing. In this last case, it can be useful to confirm the experimental results and to rebuild the physical phenomena as well. The subject of this paper is the numerical rebuilding process, by means of the FLUENT cod...

The behaviour of a SiC-fibre-reinforced composite with a graded matrix was investigated in an arc jet facility. The graded matrix was comprised of several layers of silicon carbide that transition to a mixed SiC-HfB2 top layer and was sealed with an HfB2-SiC coating. Samples were exposed to maximum specific total enthalpy hypersonic flow between 14...

In the present paper, a novel working standard for metrological verification of Gardon gauge (Gg) is presented. The authors propose to couple the radiative and convective thermal sources in order to achieve high values of thermal flux. This is particularly important for those laboratories where high heat flux values have to be measured, such as on...

A facility characterization test campaign was performed for NASA in SCIROCCO Plasma Wind Tunnel, with increasing enthalpy and constant reservoir pressure. In the frame of numerical rebuilding of the experimental data, an important gap among measured and CFD numerically predicted values of heat flux led to deep analyses the numerical methods and the...

Study on the definition of test conditions, based on the LHTS methodology, for QARMAN full-scale test in CIRA’s SCIROCCO PWT.

In the frame of numerical rebuilding of SCIROCCO Plasma Wind Tunnel measurements, made during a facility characterization test campaign performed for NASA at increasing enthalpy and constant pressure, an important gap among measured and numerically predicted values of heat flux led to deep analyses of the models usually employed for test rebuilding....

MHD interaction has been investigated in the last years as an advanced tool for flow control for aerospace applications, with special regard to heat load and drag reduction. This paper deals with the numerical rebuilding of the experimental data from test campaigns carried on at the Italian Aerospace Research Center in the frame of different projec...

This paper deals with the computational fluid dynamics analysis of a capsule entering the earth atmosphere at the end of a sample return mission. Several numerical simulations have been carried out to assess the flowfield environment past a sphere-cone capsule, by using non-equilibrium reacting gas approximations. Heat shield ablation and effects o...

The application of non-intrusive optical devices, such as infrared pyrometers able to measure the temperature of surfaces, makes possible the evaluation of emissivity curve of the tested materials at different temperature values. In this paper the authors propose a methodology for the spectral emissivity measurement by means of a single color pyrom...

An experimental investigation related to the thermal protection system (TPS) interfaces of the intermediate experimental vehicle has been carried out in the Plasmatron facility at the von Karman Institute for fluid dynamics. The objective of this test campaign is to qualify the thermal behaviours of two different TPS interfaces under flight represe...

Experiments are in course of development at CIRA Laboratories for the experimental determination of the surface emissivity of materials candidate for thermal protection systems of re-entry vehicles from space missions. The proper knowledge of the surface emissivity is a very important task during the development of tests in ground facilities as pla...

The use of hydrogen as energy carrier in a low emission microturbine could be an interesting option for renewable energy storage, distributed generation and combined heat & power. However the hydrogen using in gas turbine is limited by the NOx emissions and the difficulty to operate safely. CFD simulations represent a powerful and mature tool to pe...

The present paper reports the design, execution and numerical rebuilding of two plasma wind tunnel experimental campaigns carried out with the aim to characterize the behaviour of a deflected control surface in high enthalpy reacting flow conditions. The experimental campaigns have been conceived to reproduce on the control surface the mechanical a...

The experimental determination of spectral emissivity of the surface of materials for thermal protection systems of re-entry vehicles in the Earth's atmosphere has always been a target during tests in the hypersonic plasma ground simulators. By this way, the application of non-intrusive optical devices, such as infrared pyrometers able to measure t...

The use of hydrogen as energy carrier in a low emission microturbine could be an interesting option for renewable energy storage, distributed generation and combined heat & power. Hydrogen can give several advantages respect to conventional fuels, i.e. natural gas, since its pollutant impact becomes mainly limited to NOx emission. However hydrogen...

This paper deals with the experimental investigation on the MHD (magneto-hydro-dynamic or magneto-fluid-dynamic) interaction around a test body immersed into a hypersonic unseeded air flow. The experiments have been carried out in the CIRA plasma wind tunnel SCIROCCO. Two test conditions have been utilized for the experiments with a total pressure...

This work is dedicated to the aerothermodynamic characterization, both in flight and at wind-tunnel conditions, of the ultrahigh temperature ceramic winglet that will embark on the European Experimental Reentry Testbed of the European Space Agency. The experimental test has been executed in the Centro Italiano Ricerche Aerospaziali SCIROCCO plasma...

This summary paper is related to the experimental investigation on the magneto fluid dynamic interaction around a blunt test body immersed into a hypersonic unseeded air flow. The experiments have been carried out in the CIRA owned plasma wind tunnel SCIROCCO. Two test conditions have been utilized for the experiments, with a total pressure of 2.5...

A large part of the SCIROCCO Arc Heater Performance Map has been investigated. The heat flux measurements at the stagnation point of the facility Calibratio Probe have been used to find an experimental fit. Such a formula has been compared with the predictions of the De Filippis-Serpico equation and the well known Fay-Riddell formula. Finally the e...

In the frame of the InFlight Test Measurement Techniques for Aerothermodynamics activity of the EXPERT Program, the EXPERT Instrumented Open Flap Assembly experiment had the objective to verify the design/sensor integration over the flap and validate the CFD tools in Europe largest high enthalpy plasma facility, Scirocco. Two flaps, instrumented wi...

In the framework of a private research program the development of a compact proton exchange membrane (PEM) electrolyzer system with a capacity of 300 Nl/h was developed. In this paper, the electrochemical properties of electrolyzer stack (10 cells of 100 cm(2) geometrical area) were investigated at different temperatures. Overall stack efficiencies...

The electrochemical properties of a proton exchange membrane (PEM) stack electrolyzer (9 cells of 100 cm2 geometrical area) were investigated at different temperatures. An amount of H2 of ∼270 l h−1 was produced at 60 A (600 mA cm−2) and 70 °C under 876 W of applied electrical power. The corresponding specific energy consumed in the process was 3.2...

A scientific experiment at CIRA SCIROCCO Plasma Wind Tunnel was conceived to assess the design of ESA EXPERT Open Flap PL6/8 under flight representative heat flux and load conditions. A specific and dedicated model holder was designed to test the Qualification Model of the instrumented CMC Flap in real size and equipped with the same flight instrum...

A Test campaign in the frame of the ASI (Italian Space Agency) funded project CAST (Advanced Aerothermodynamic Configurations for Space Transport) was performed at the CIRA GHIBLI plasma wind tunnel. The CAST Test campaign in GHIBLI consisted of more than 20 test cases including Probe measurements, microwave absorption measurements and a MHD experi...

In the frame of the "In-Flight Test Measurement Techniques for Aerothermodynamics" activity of the EXPERT Program, the EXPERT Instrumented Open Flap Assembly experiment has the objective to verify the design/sensor integration and validate the CFD tools. Ground based measurements were made in Europe's largest high enthalpy plasma facility, Scirocco...

An advanced flow control experiment, concerning magnetohydrodynamics (MHD) interaction over a blunt body, has been designed by Alta, CIRA and Department of Electrical Engineering (DIE) of University of Bologna and to be realized in CIRA's plasma wind tunnel "Scirocco" under a technology research program (TRP) funded by the European Space Agency (ES...

An optimization study of components and assembling characteristics for a proton exchange membrane (PEM) short stack electrolyzer (3 cells of 100 cm2 geometrical area) was carried out. The electrochemical properties were investigated by polarization, impedance spectroscopy and chrono-potentiometric measurements. A decrease of the ohmic contact resis...