基于重力方向影响的低压涡轮叶片水流量测量数值计算

为分析叶片摆放方向(重力)对某型发动机低压涡轮转子叶片水流量测量的影响,对某低压涡轮转子叶片(2种内腔冷却结构)在4种不同重力方向作用下的水流量进行数值计算。结果表明:重力方向对水流量测量结果的影响可以忽略。针对第1种内腔冷却结构的叶片,将测量设备进口引流管路加入计算模型,分别计算4种不同重力方向作用下的水流量。结果表明:在不同工况下由该测量设备引流管路导致的水流量测量结果变化很小,可以忽略不计。将计算结果及实测数据分别与测量标准要求进行对比分析,数据拟合度较好。

Numerical Calculation of Water Flow Measurement of Low-pressure Turbine Blade Based on theInfluence of Gravity

In order to analyze the influence of blade placement direction(gravity)on water flow measurement of low-pressure turbine rotor blade of a certain engine,the water flow rate of a low-pressure turbine rotor blade(two kinds of inner cavity cooling structure)under four different gravity directions was calculated.The results show that the influence of gravity direction on water flow measurement is negligible.Aiming at the blade of the first kind of inner cavity cooling structure,the inlet drainage pipelines of the measuring equipment were added to the calculation model,and the water flow under the action of four different gravity directions was calculated respectively.The results show that the water flow measurement results caused by the drainage pipelines of the measuring equipment have little change under different working conditions,which can be ignored.The calculation results and the measured data are compared with the measurement standard requirements,respectively,and the data fitting degree is better.