Aerodynamic Effect brought by a Strut-Cowl System in a Scramjet Engine

Sato, Shigeru; Watanabe, Takahiro; Fukui, Masaaki; Munakata, Toshihiko

doi:10.2514/6.2012-5886

18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012

DOI: 10.2514/6.2012-5886

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Aerodynamic Effect brought by a Strut-Cowl System in a Scramjet Engine

Shigeru Sato

Takahiro Watanabe

Masaaki Fukui³

et al.

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2015

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“…[18][19][20][21] The authors are focusing the influence of strut-cowl system shock wave on the fuel distribution by using CFD, and have found advantages of configuration with a strut. 21,22 The authors describe here the result of virtual experiments for optimization of fuel distribution in a scramjet engine using streamlines in CFD simulations based on the experimental data obtained in RJTF, JAXA. The interest of the authors is where to set the fuel injection position in order to let the fuel go into the high mass flux (density times velocity: ρu) area in the engine inner flow.…”

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confidence: 99%

Virtual Experiment for Optimization of Fuel Distribution in a Scramjet Engine

Sato¹,

Fukui²,

Watanabe³

et al. 2015

20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference

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Japan Aerospace Exploration Agency (JAXA) has been investigating scramjet engines in KakudaSpace Center using RamJet Engine Test Facility (RJTF) et al. The engine tested at the flight condition of Mach 6 showed very steep fuel distribution. The authors are researching the influence of shock wave from strut-cowl system on the fuel distribution by using CFD based on RJTF tests, and have found advantages of strut in the engine. Here describe the authors the result of virtual experiments for optimization trial of fuel distribution in the engine by means of tracing back along streamlines in the view point where to set the fuel injection positions in order to let the fuel go into high mass flux area in the engine.Ⅰ．Introduction n hypersonic air-breathing engine researches many different trials have been done in order to obtain better propulsion performance or to create new systems. 1-4 In Japan since around 1985 National Aerospace Laboratory (present JAXA) has been carrying out scramjet engine research, and Ramjet Engine Test Facility (RJTF) was built in Kakuda Research Center (present Kakuda Space Center) in 1993 for the research.Kakuda Space Center has been conducting the scramjet engine tests for flight condition of Mach 4, 6, 8 and the higher in RJTF and another facility respectively. [5][6][7][8][9][10][11][12][13][14][15] In the scramjet engine tests carried out in the RJTF it has been found that the difference of engine inner configuration, mainly strut shape, produces large difference of thrust performance in the condition of Mach 6. 5 In addition to the above it has been also found that the fuel cannot spread all over the engine cross section and concentrates to the top wall side. 5 Some fraction of the fuel is exhausted without burning and does not contribute the thrust production. This prevents the engine from fully performing. Optimization for the fuel distribution is needed.In this viewpoint researches have been made on fuel injection for scramjet engines. Roughly classifying, they are a) how I 1 Senior Researcher,

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confidence: 99%

Virtual Experiment for Optimization of Fuel Distribution in a Scramjet Engine

Sato¹,

Fukui²,

Watanabe³

et al. 2015

20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference

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Aerodynamic Effect brought by a Strut-Cowl System in a Scramjet Engine

Cited by 1 publication

References 11 publications

Virtual Experiment for Optimization of Fuel Distribution in a Scramjet Engine

Virtual Experiment for Optimization of Fuel Distribution in a Scramjet Engine

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