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Scramjet engine tail pipe design and performance

Author: LiJianPing
Tutor: LeJiaLing
School: Northwestern Polytechnical University
Course: Thermal Power Engineering
Keywords: Scramjet Numerical Simulation Tailpipe design Performance parameters characteristic line Optimal Design
CLC: V235
Type: Master's thesis
Year: 2006
Downloads: 527
Quote: 1
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Abstract


Supersonic combustion ramjet engine is a new type of air-breathing power plant, because of its good performance and huge potential advantages , has broad application prospects in the future of aviation and aerospace fields . Scramjet inlet, isolator , combustor and exhaust nozzle . The tail pipe is the main components of the scramjet engine thrust , its performance depends both on its geometric configuration , in turn depends on the number of M along the flight path , dynamic pressure , angle of attack , the inlet and combustor performance . Therefore, the law of the tail pipe configuration design of geometric parameters on tailpipe performance has become the the scramjet field of important research direction . In this paper, a simple method of characteristics has been optimized for the scramjet engine tail pipe . Use the commercial software FLUENT tail pipe internal flow field numerical simulation, and summarizes the geometric parameters of the tail pipe (initial expansion angle , the total length of the tail pipe , the external nozzle height , length of the housing , the inner wall of the housing expansion angle ) tailpipe performance investigated. Application simple method of characteristics and particle swarm optimization algorithm to optimize the design of the tail pipe . The results show that the simple method of characteristics to design a supersonic combustion ramjet engine tail pipe wall line is simple and feasible . Analyzed by calculating the geometric parameters on tailpipe performance investigated and the optimal design of the tail pipe , the reference range for the scramjet engine exhaust nozzle geometry parameters choice .

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CLC: > Aviation, aerospace > Aviation > Aero-engine ( propulsion system ) > Air jet engine
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