准确计算流道内的能量损失对预测离心式压缩机的级性能十分重要。本文根据附面层理论,在某些假定的条件下,推导出直接计算叶片扩压器内总压损失的公式。用此公式计算的结果与实验数据非常接近,其相对误差比按照常用的“流道法”和“损失系数法”的误差小得多。 Accurately calculating the energy loss in the runner is very important for predicting the performance of the centrifugal compressor. In this paper, based on the theory of attached surface, the formula for directly calculating the total pressure loss in the vane diffuser is deduced under some assumptions. The result calculated by this formula is very close to the experimental data, and its relative error is much smaller than that of the commonly used “runner method” and “loss coefficient method”.