皮托管式静压探针气动性能的CFD和试验对比研究

CFD and Test Comparison Study on Aerodynamic Performance of Pitot Static Pressure Probe

针对1种用于航空发动机内流道静压测量的皮托管式静压探针,通过CFD仿真计算和风洞试验对其气动性能进行对比研究。结果表明:来流速度在Ma=0.3～0.7范围内,CFD计算结果和试验结果有较高的一致性;探头上的压力系数在不同Ma下具有相同的分布规律,压力最大值出现在探头前端,最小值出现在约x_1/L=0.07处;随着Ma升高,支杆上的附面层分离点前移并导致探头上的压力系数略有增大;试验结果还表明,在x_1/L=0.1处开感压孔能够获得较高的测试精度。

The aerodynamic performance of a pitot static pressure probe used in aeroengine hydrostatic pressure measurement of internal channel was contrasted and studied by CFD simulation and wind tunnel test. The results show that when the velocity of incoming flow is in the range of Ma=0.3~0.7,the calculated results of CFD are in good agreement with the test results. The pressure coefficient on the probe has the same distribution law under different Ma. The maximum pressure appears at the front of the probe and the minimum at about x1/L=0.07. With the increase of Ma,the separation point of boundary layer on the support rod moves forward and the pressure coefficient on the probe increases slightly. The test results also show that the high test precision can be obtained by opening the sensitive pressure-hole at x1/L=0.1.