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对旋流喷嘴在脉动压力作用下的内部流动进行了数值模拟,分析了瞬时流量、平均流量、雾化角、脉动压力与瞬时流量间相位差随脉动压力频率的变化规律.结果表明:瞬时流量和雾化角均呈现与脉动压力频率相同的周期性变化,且瞬时流量与雾化角之间相位相差一个π角;喷嘴出口的平均流量随脉动压力频率的变化呈振荡变化,其变化规律比较复杂.
The internal flow of swirl nozzle under pulsating pressure was numerically simulated, and the variation of the phase difference between pulsating pressure and instantaneous flow rate, average flow rate, atomization angle, pulsating pressure and instantaneous flow rate was analyzed. The results show that the instantaneous flow rate And atomization angle showed the same periodic changes with the pulsating pressure frequency, and the instantaneous flow rate and the phase difference between the atomization angle is an angle of π. The average flow at the nozzle exit fluctuates with the variation of the pulsating pressure frequency, and its variation is compared complex.