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讨论了针型喷嘴结构参数——入口角对输出功率的影响，根据实验结果，建立了rrrrrrrrn数学模型，并基于VB 程序设计方法对该模型进行了优化，从而得出喷嘴输出功率达rrrrrrrrn到最大值的最佳入口角值。
Based on the experimental result, the mathematical model of r r r r r r r r r n is discussed and the design method of VB The model was optimized to find the best inlet angle value for the nozzle output power up to the maximum.