动力工程学报
動力工程學報
동력공정학보
JOURNAL OF POWER ENGINEERING
2012年
7期
538-541
,共4页
旋流喷嘴%脉动压力%瞬时流量%脉动频率%流动特性%数值模拟
鏇流噴嘴%脈動壓力%瞬時流量%脈動頻率%流動特性%數值模擬
선류분취%맥동압력%순시류량%맥동빈솔%류동특성%수치모의
swirl nozzle%pulsating pressure%instantaneous flow%pulsating frequency%flow characteristic%numerical simulation
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兀角；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．
對鏇流噴嘴在脈動壓力作用下的內部流動進行瞭數值模擬，分析瞭瞬時流量、平均流量、霧化角、脈動壓力與瞬時流量間相位差隨脈動壓力頻率的變化規律．結果錶明：瞬時流量和霧化角均呈現與脈動壓力頻率相同的週期性變化，且瞬時流量與霧化角之間相位相差一箇兀角；噴嘴齣口的平均流量隨脈動壓力頻率的變化呈振盪變化，其變化規律比較複雜．
대선류분취재맥동압력작용하적내부류동진행료수치모의，분석료순시류량、평균류량、무화각、맥동압력여순시류량간상위차수맥동압력빈솔적변화규률．결과표명：순시류량화무화각균정현여맥동압력빈솔상동적주기성변화，차순시류량여무화각지간상위상차일개올각；분취출구적평균류량수맥동압력빈솔적변화정진탕변화，기변화규률비교복잡．
Numerical simulation on flow characteristics in a swirl nozzle has been carried out at pulsating pressures, while how following factors vary with the pressure pulsating frequency analyzed, such as the instantaneous flow, average flow, atomization angle and the phase difference between the pulsating pres sure and the instantaneous flow, etc. Results show that the instantaneous flow and atomization angle change periodically at the same frequency as the pulsating pressure, and the phase difference between them is π; the average flow at nozzle outlet changes in an oscillatory way with the rise of pressure pulsating frequency, of which the variation law is relatively complicated.
