Analysis of Noise Characteristics Caused by Two-Phase Flow in Shut-off Throttle Valve
With the development of air conditioning technology,new throttle valves such as electronic expansion valves,shut-off throttle valves and short tube throttle valves are used in air conditioners instead of capillary tubes.However,little research has been done on the shut-off throttle valve,so the flow fields of the shut-off throttle valve were calculated at different flow rates.The distributions of pressure field,velocity field,and sound power level under different operating conditions were obtained by numerical calculations.The results show that:with the increase of valve inlet flow,the maximum flow velocity at the valve throttle increases from 44.331 3 m/s to 77.560 4 m/s;with the increase of valve inlet flow,the pressure drop at the throttle also increases gradually;when the valve inlet flow increa-ses from 0.014 kg/s to 0.024 kg/s,the maximum noise of the valve increases from 104.640 2 dB to 122.751 5 dB;the noise in the flow field is mainly concentrated at the downstream of the valve and the throttle orifice,and the maximum noise appears at the end of the straight pipe section downstream of the valve,the distribution characteristics of noise also provide direction for further optimization of valves.
万方数据
维普
