Aerodynamic Testing of the Orion Launch Abort Tower Separation with Jettison Motor Jet Interactions

阅读量：

12

作者：

Matthew N. Rhode，David T. Chan，Charles J. Niskey，Thomas M. Wilson

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摘要：

The aerodynamic database for the Orion Launch Abort System (LAS) was developed largely from wind tunnel tests involving powered jet simulations of the rocket exhaust plumes, supported by computational fluid dynamics (CFD) simulations. The LAS contains three solid rocket motors used in various phases of an abort to provide propulsion, steering, and Launch Abort Tower (LAT) jettison from the Crew Module (CM). This paper describes a pair of wind tunnel experiments performed at transonic and supersonic speeds to determine the aerodynamic effects due to proximity and jet interactions during LAT jettison from the CM at the end of an abort. The tests were run using two different scale models at angles of attack from 150deg to 200deg , sideslip angles from -10deg to +10deg , and a range of powered thrust levels from the jettison motors to match various jet simulation parameters with flight values. Separation movements between the CM and LAT included axial and vertical translations as well as relative pitch angle between the two bodies. The paper details aspects of the model design, nozzle scaling methodology, instrumentation, testing procedures, and data reduction. Sample data are shown to highlight trends seen in the results.

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关键词：

Aerodynamic characteristics Angle of attack Computational fluid dynamics Jettison systems Launching Wind tunnel tests Supersonic speed Spacecraft modules Rocket exhaust Sideslip Simulation Scale models Data bases

会议名称：

29th AIAA Applied Aerodynamics Conference

主办单位：

American Institute of Aeronautics and Astronautics