中文摘要：

水喷射泵广泛应用于供热系统．针对4个典型的水喷射泵，通过计算分析，讨论了区域供热系统管网参数变化对喷射泵几何尺寸的影响．比较计算结果发现，在其他参数不变的前提下，供热负荷对喷射泵几何参数影响较大，工作流体温度对截面比影响较明显，而系统压力损失的改变对喷射泵扩散管部分的尺寸无影响．

英文摘要：

Water injectors are widely utilized in heat supply systems. The effect of operating parameters of district heat supply system on injector geometries is discussed for four typical injectors by calculation analysis method. Comparisons of calculation results illustrate that heat supply load affects injector geometry more greatly, and motive fluid temperature has greater impact on injectorrs area ratio, while pressure lost change of system offers no effects on diffusion tube of injector.