本文研究了两种实际气体多变功的直接积分数值求解模型,并编制了相应的计算程序.通过与平均过程指数法求得的多变功结果对比发现,直接积分求解模型较平均过程指数法计算得到的多变功具有更高的精度.当压比较高时,平均指数法得到的多变功误差明显增大甚至超过了4%,而直接积分模型计算得到的多变功在高压比下仍具有较高精度.
Two direct integration models of polytropic head analysis are presented,and the program codes are developed.It is found that the models of direct integration procedure are more accurate than that of average polytropic exponent in the polytropic head calculation.When the pressure ratio being large,the direct integration method still keeps higher accuracy while the error of the model of averaged polytropic exponent obviously increases even by over 4%.
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