航空发动机

明亮1 ，冯昊天 1 ，刘家兴 2 ，郑培英 2 ，王志涛 1* ，张轲2.级间引气条件下轴流压气机特性预测方法[J].航空发动机,2023,49(5):34-39

级间引气条件下轴流压气机特性预测方法

Prediction Method of Axial Flow Compressor Characteristics under Interstage Bleed Conditions

DOI：

英文关键词:multistage axial compressor interstage bleed interstage matching characteristic prediction performance analysis gas turbine

基金项目:航空动力基础研究项目资助

作者	单位
明亮1 ，冯昊天 1 ，刘家兴 2 ，郑培英 2 ，王志涛 1* ，张轲2	1. 哈尔滨工程大学动力与能源工程学院，哈尔滨150001；2. 中国航发沈阳发动机研究所，沈阳110015

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中文摘要:

为了确定级间引气对多级轴流压气机特性的影响，便于在燃气轮机整体性能分析时简化引气模型，开展级间引气条件下轴流压气机特性预测方法研究，通过级间匹配模型求解引气位置压力、温度和引气位置上下游的特性，根据引气后的上下游重新匹配确定受引气影响的压气机特性线。结果表明：对5级压气机在换算转速为1.0、0.7和0.5倍设计转速情况下分别进行了预测，得到的特性线与压气机原特性线相比有明显变化。在压比-流量特性图中，引气后的等换算转速线整体位于原特性线之上，压气机压比提高，在小流量时提高较小，在大流量时提高较大，并且提高效果随引气流量增加逐渐明显；在效率-流量特性图中，引气后的等换算转速线与原特性线交于一点，在该点左侧效率因引气而降低并随着引气流量增大而进一步降低，在该点右侧则刚好相反。采用此5级压气机的抽放气特性对性能预测模型进行了验证，引气位置总温的相对误差不超过1%，总压的相对误差不超过2%。

英文摘要:

The research on the prediction method of axial flow compressor characteristics under the interstage bleed conditions was carried out to determine the influence of interstage bleed on the characteristics of multistage axial compressors and simplify the bleed mod? el in the overall performance analysis of gas turbines. The pressure and temperature of the bleed position and the characteristics of up? stream and downstream of the bleed position were obtained by the interstage matching model. The compressor map affected by the inter? stage bleed condition was determined by rematching the characteristics of upstream and downstream of the bleed position. The characteris? tics of the five-stage compressor under the interstage bleed condition were predicted at 100%，70%，and 50% corrected speed respective? ly. The results show that the predicted compressor map is significantly changed compared with the baseline. In the pressure ratio-flow char? acteristic map，the predicted constant corrected speed lines after bleed are generally above those of the baseline. The compressor pressure ratio increases，with a small increase at low flow rate and a significant increase at high flow rate，and the lifting effect grows with the in? crease of the bleed flow rate. In the efficiency-flow characteristic map，the predicted constant corrected speed line intersects with that of the baseline at a point. On the left side of the point，the efficiency decreases due to the bleed and further decreases with the increase of the bleed flow rate，while on the right side of the point，the opposite is true. The prediction method was verified by the characteristics of the five-stage compressor under the interstage bleed conditions. At the bleed position，the relative error of the total temperature is less than 1%，and the relative error of the total pressure is less than 2%.

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