改进堵孔法在主燃烧室上的试验研究

Experimental Study on Improved Hole PluggingMethod of Combustor

关键词:  主燃烧室  流量分配  堵孔法  参考压力损失  流量特性曲线

Key words:  Combustor  Flow distribution  Hole plugging method  Reference pressure loss  Flow characteristic curve

摘要:

为了简化主燃烧室流量分配的试验方法，对传统堵孔法进行了改进，提出了一种采用参考压力损失与进口空气流量来建立流量特性曲线，之后通过求解线性方程组获得燃烧室流量分配比例的方法。通过在一扇形燃烧室上进行流量分配试验，验证了改进方法的可行性。研究结果表明：采用改进的堵孔法压力测点数最少为2个，能够有效减少试验测点和试验测量仪器的数量，不同测点位置测量获得的孔流量分配比例基本一致，在1%~4%参考压力损失范围内，不同参考压力损失对流量分配比例基本无影响,改进堵孔法测得的流量分配比例在试验参考压力损失范围内误差不超过4%。

Abstract:

In order to simplify the test method of combustor flow distribution, traditional hole plugging method was improved. The reference pressure loss and the inlet air mass flow were used to establish the flow characteristic curves. Then linear equations were used to obtain the flow distribution of the combustor. The feasibility of the improved method was verified by flow distribution test on a multi-sector combustor. The results show that the improved hole plugging method can effectively reduce the number of test points which is at least 2 point and test instruments. The flow distributions obtained at different test points are basically the same. In the range of 1%~4% reference pressure loss, the different reference pressure losses have little effect on the flow distribution ratio. Thus，the error of the flow distribution result measured by the improved hole plugging method does not exceed 4% within the test reference pressure loss range.