The effect of mass flow rate on convection heat transfer is complicated.

流量对对流换热的影响比较复杂。

With increase of mass flow rate, solid-gas ratio increases first and then decreases.

随着煤粉的输送流量的增大，固气比先增大后减小。

The control properties of vortex valve for mass flow rate are numerically simulated.

用数值模拟研究了涡流阀的流量调节特性。

Experiments were carried out to the research on mass flow rate measurement using vortex flowmeter.

对利用差压原理进行质量流量测量的方法进行实验研究。

The results indicate that the vortex valve has good property for controlling nozzle mass flow rate.

计算表明，涡流阀有良好的流量调节特性。