低速TPS试验内式流量控制技术研究

TPS试验技术是风洞中研究飞机/发动机一体化设计的最佳手段之一。作为发动机模拟器的TPS单元采用高压空气驱动，因此高压供气流量控制精度与试验精度直接相关。常用的外式流量控制方式由于风洞模型内部空间限制，无法对2台以上的TPS单元进行流量控制。针对外式流量控制方式的不足，设计了一种基于双喉道匹配设计的内式流量控制装置，集流量控制与测量功能于一体，可同时进行4台TPS单元的流量控制，满足4发运输机的动力模拟试验需求。为考核该装置的性能，进行了地面校核试验，试验结果表明该装置具有良好的流量线性控制能力，控制分辨率优于0.15 g/s，流量控制精度优于3 g/s；在8 m×6 m低速风洞进行了某型飞机全模TPS动力模拟试验，试验重复性精度满足国军标合格指标。

Internal mass flow control technology of low speed TPS tests

The TPS testing technology is one of the best methods to study the aircraft/propulsion integrated design in wind tunnels. TPS units, used as engine simulators, are driven by high pressure air. As a result, the mass flow control accuracy of high pressure air has a direct relationship with the wind tunnel testing accuracy. Because of space limits of wind tunnel testing models, the external mass flow control method can not control more than 2 TPS units. In order to overcome deficiencies of the external mass flow control method, a kind of internal mass flow control device was designed. This device integrates the control and measure function, and can control 4 TPS units simultaneously. A check test was conducted in the TPS testing chamber of CARDC. The testing results indicate that the device has good linear mass flow control ability, the control resolution is better than 0.15 g/s, and the control repeatability accuracy is better than 3 g/s. A full model TPS test was conducted in the 8 m×6 m low speed wind tunnel of CARDC as well. The repeatability testing accuracy meets the demands of GJB, which verifies the control accuracy of the device.