中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2015年
16期
2165-2169,2221
,共6页
节流阀口%空化表征%特性曲线%体积流量
節流閥口%空化錶徵%特性麯線%體積流量
절류벌구%공화표정%특성곡선%체적류량
throttle port%cavitation characterization%cavitation curve%flow rate of volume
探讨了二级节流阀口空化概率的表征，并在经典空化数σ基础上提出了适用于二级节流阀口空化剧烈程度表征的空化指数计算式。在节流阀口空化表征基础上研究了 U 形和 V 形节流阀口的空化特性曲线，得出如下结论：U 形和 V 形节流阀口的空化气蚀剧烈区始终集中在较小过流截面 A 2上，并且当阀口体积流量方向反转时节流空化特性表现出明显差异；当流体流入过流截面 A 1时 A 2截面上的空化指数要大于流体流出过流截面 A 1时 A 2截面上的空化指数，从宏观上则反映为流入截面 A 1时的体积流量要小于流出 A 1时的体积流量。
探討瞭二級節流閥口空化概率的錶徵，併在經典空化數σ基礎上提齣瞭適用于二級節流閥口空化劇烈程度錶徵的空化指數計算式。在節流閥口空化錶徵基礎上研究瞭 U 形和 V 形節流閥口的空化特性麯線，得齣如下結論：U 形和 V 形節流閥口的空化氣蝕劇烈區始終集中在較小過流截麵 A 2上，併且噹閥口體積流量方嚮反轉時節流空化特性錶現齣明顯差異；噹流體流入過流截麵 A 1時 A 2截麵上的空化指數要大于流體流齣過流截麵 A 1時 A 2截麵上的空化指數，從宏觀上則反映為流入截麵 A 1時的體積流量要小于流齣 A 1時的體積流量。
탐토료이급절류벌구공화개솔적표정，병재경전공화수σ기출상제출료괄용우이급절류벌구공화극렬정도표정적공화지수계산식。재절류벌구공화표정기출상연구료 U 형화 V 형절류벌구적공화특성곡선，득출여하결론：U 형화 V 형절류벌구적공화기식극렬구시종집중재교소과류절면 A 2상，병차당벌구체적류량방향반전시절류공화특성표현출명현차이；당류체류입과류절면 A 1시 A 2절면상적공화지수요대우류체류출과류절면 A 1시 A 2절면상적공화지수，종굉관상칙반영위류입절면 A 1시적체적류량요소우류출 A 1시적체적류량。
The cavitation characterization of two stage throttle port was studied,and using classical cavitation definitionσ,new-form cavitation characterization index was obtained,which was applicable, to two stage throttle port.In the calculation formulae of new-form cavitation characterization index,all design parameters needed by two-stage throttle port were included.Applying the calculation formule, cavitation characterization curves of U and V throttle ports were plotted,and it is observed from the plots that whether U or V throttle port,cavitation concentration region is always around section A 2 , and that the cavitation characterization index of section A 2 when liquid flows into section A 1 is always larger than that of A 2 when liquid flows out from section A 1 ;the macroscopic phenomena is that flow rates of different flow directions are different,and also flow rate out of section A 1 is larger than that of flow rate into section A 1 .
