低速风洞全模TPS试验空气桥的设计与优化

Design and optimization of the air bridge for low speed full-span TPS test

TPS试验技术是目前风洞试验中最先进的涡扇发动机模拟技术,空气桥是TPS试验技术的关键技术之一。介绍了低速全模TPS试验空气桥的设计。通过有限元数值模拟对空气桥关键受力梁进行了优化设计,并进一步对空气桥进行了整体优化,掌握了关键参数影响空气桥性能的规律。综合考虑模型内部空间、内部设备及空气桥的技术要求,完成了空气桥的设计,优化后空气桥对天平测力的影响较小,且同时具有较好的克服高压空气的内力、温度效应的能力。试验结果表明,空气桥性能满足TPS试验的要求。

TPS（Turbofan Powered Simulator）technology is the most advanced engine simula tion in wind tunnel test. The air bridge is a key technology of TPS tests. This paper presents the design of the air hridge for low speed full-span TPS test. Optimum designs are made for the key beams of the air bridge by using FEM （finite-element method）. Layout and the dimension of bel- lows are also optimized. According to the computation results, the key law of air bridge design is concluded. The air bridge is finally designed according to the space of the model, the inside e- quipments and the requirement of the TPS test. The final design has little effect on force meas- urement and has little pressure and temperature effect. The success in low speed full-span TPS test indicates that the air bridge meet the requirement of TPS test.