哈尔滨工业大学学报
哈爾濱工業大學學報
합이빈공업대학학보
JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY
2015年
4期
76-80
,共5页
管道喷雾%直接蒸发冷却%DPM模型%蒸发效率
管道噴霧%直接蒸髮冷卻%DPM模型%蒸髮效率
관도분무%직접증발냉각%DPM모형%증발효솔
air duct spraycooling%direct evaporative cooling%discrete phase model%evaporatingefficiency
为研究雾滴粒径、喷头间距、风速和喷雾比等参数的改变对管内喷雾降温蒸发效率的影响，采用DPM模型方法对送风管道内喷雾直接蒸发冷却进行数值模拟和分析。通过单因素和多因素正交试验模拟，得到各参数最佳工况。模拟结果表明：粒径、风速和喷雾比越小时，蒸发效率越高；喷头间距的最佳值，应根据饱和水气比、空气流速、喷头的喷出速度和喷射角度确定。根据模拟结果，考虑系统经济性，对雾滴粒径小于30μm、风速1 m／s以下的工况，喷雾比下限为0?7，蒸发效率最高可达92％，饱和效率可达65％以上。
為研究霧滴粒徑、噴頭間距、風速和噴霧比等參數的改變對管內噴霧降溫蒸髮效率的影響，採用DPM模型方法對送風管道內噴霧直接蒸髮冷卻進行數值模擬和分析。通過單因素和多因素正交試驗模擬，得到各參數最佳工況。模擬結果錶明：粒徑、風速和噴霧比越小時，蒸髮效率越高；噴頭間距的最佳值，應根據飽和水氣比、空氣流速、噴頭的噴齣速度和噴射角度確定。根據模擬結果，攷慮繫統經濟性，對霧滴粒徑小于30μm、風速1 m／s以下的工況，噴霧比下限為0?7，蒸髮效率最高可達92％，飽和效率可達65％以上。
위연구무적립경、분두간거、풍속화분무비등삼수적개변대관내분무강온증발효솔적영향，채용DPM모형방법대송풍관도내분무직접증발냉각진행수치모의화분석。통과단인소화다인소정교시험모의，득도각삼수최가공황。모의결과표명：립경、풍속화분무비월소시，증발효솔월고；분두간거적최가치，응근거포화수기비、공기류속、분두적분출속도화분사각도학정。근거모의결과，고필계통경제성，대무적립경소우30μm、풍속1 m／s이하적공황，분무비하한위0?7，증발효솔최고가체92％，포화효솔가체65％이상。
In order to estimate the influence of particle diameter,nozzle spacing, wind speed and the sprayed ratio on the evaporating efficiency,numerical simulation of direct evaporative cooling of spray in the air ductwas processed using discrete phase model ( DPM ) . Through single factor analysis and multi?factors orthogonal method, the optimal operating conditionswereacquired. Simulation results showed that, the smaller diameter, wind speed and sprayed ratio generates higher evaporating efficiency. Anoptimum nozzle distance should be determined by saturated water?gas ratio, wind speed, injection velocity and injection angle. According to simulation results, considering the economyof the spray system, particlediameterunder 30 μm, wind speed under 1 m/s, sprayed ratio higher than 0?7, the evaporating efficiency could achieve 92%, with saturated efficiency higher than 65%.
