张海灯,吴 云,李 军,李应红.测点布局对航空发动机总压畸变指数的影响[J].航空发动机,2023,49(6):99-108
测点布局对航空发动机总压畸变指数的影响
Influences of Sensor Location on Total Pressure Distortion Descriptor of Aeroengine
  
DOI:
中文关键词:  总压畸变  测点布局  畸变流场  周向位置  结果偏差  航空发动机
英文关键词:total pressure distortion  sensor location  distorted flow field  circumferential location  result deviation  aeroengine
基金项目:国家级基金项目资助
作者单位
张海灯,吴 云,李 军,李应红 空军工程大学 航空工程学院西安 710038 
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中文摘要:
      为了阐明测点布局对航空发动机进气总压畸变测试结果的影响,利用旋转总压测量耙对5种畸变流场的稳态和动态总 压畸变成分进行了测试,计算了旋转总压测量耙位于不同位置时畸变流场的稳态周向总压畸变指数和动态总压畸变指数,分析了 不同测点布局下总压畸变指数计算结果的偏差。结果表明:测量耙/测点与畸变流场的相对周向位置对总压畸变指数计算结果的 准确性至关重要,对于所分析的5种畸变流场,增加测量耙/测点周向数目并不能使总压畸变指数计算结果的偏差单调减小,但可 降低其对测量耙/测点周向位置的敏感度。基于畸变区域周向分布设计稳态总压畸变测量耙的周向位置,组合使用不同相对半径 处测点对动态总压畸变进行监测,可提高总压畸变指数计算结果的准确性。
英文摘要:
      To elucidate the influences of sensor location on testing results of aeroengine inlet total pressure distortion, a rotating total pressure rake was used to measure both the steady-state and time-variant components of five kinds of distorted flow fields. Steady-state cir? cumferential as well as time-variant total pressure distortion descriptors at different circumferential rake locations were calculated. Then the influences of sensor location on the total pressure distortion descriptor were analyzed. The results show that the accuracy of the total pressure distortion descriptor is highly dependent on the relative circumferential location of the rake/sensor. For the five kinds of distorted flow fields, increasing the number of circumferential measurement locations does not always monotonously reduce the deviation of total pres? sure distortion descriptor calculation results, but can reduce the sensitivity of the total pressure distortion descriptor to the circumferential location of the rake/sensor. Determining the locations of steady-state total pressure distortion rake based on the characteristics of the dis? torted flow field and using a combination of time-variant total pressure measuring points at different radial locations to monitor time-vari? ant total pressure distortion are effective methods to improve the accuracy of total pressure distortion descriptor calculations.
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