theoretical throat

The calculation formulas for velocity coefficients φ_2 and φ_5 for the throat and throat inlet section were deduced from the theoretical research on the velocity coefficients in time-averaged basic equations by use of the unsteady momentum equation and time-averaged value calculation method.

运用非恒定的动量方程和时均值计算方法，对脉冲液体射流泵时均值基本方程中的流速系数进行了理论研究，推导出了喉管和喉管进口段流速系数φ2和φ5的计算式。

An analysis is made of the performance characteristics of the lower pressure waste steam jet refrigeration machine by using the gas dynamic function. The theoretical calculating formulas for specific steam consumption and throat area ratio are also derived.

本文利用气体动力函数分析了低压废汽喷射制冷机的工作特性，并导出了单位耗汽量和喉部面积比的计算公式。

Theoretical prediction of condensed phase particles deposit law on the throat surface

凝聚相粒子在喷管喉部沉积规律的理论预示