汽车工程
汽車工程
기차공정
AUTOMOTIVE ENGINEERING
2015年
8期
951-958
,共8页
乘员舱%热舒适性%PMV%PPD%空气龄
乘員艙%熱舒適性%PMV%PPD%空氣齡
승원창%열서괄성%PMV%PPD%공기령
passenger compartment%thermal comfort%PMV%PPD%mean age of air
应用整体求解法计算气固耦合传热问题,并考虑了太阳辐射和壁面间热辐射对速度场和温度场的影响,对某款轿车车内三维流场和热环境进行了数值仿真,得到了速度场、温度场和PMV与PPD的分布。仿真结果与试验数据很接近,相差在5%以内。接着对乘员热舒适性进行分析,并使用平均空气龄对舱内空气新鲜度进行评价。结果表明,在所设定的环境条件下,该轿车前排乘客感觉较热,后排乘客感觉微热,乘员舱空气新鲜度较好。据此,对模型进行修改并重新计算。结果显示,乘员舱的热舒适性得到了改善。
應用整體求解法計算氣固耦閤傳熱問題,併攷慮瞭太暘輻射和壁麵間熱輻射對速度場和溫度場的影響,對某款轎車車內三維流場和熱環境進行瞭數值倣真,得到瞭速度場、溫度場和PMV與PPD的分佈。倣真結果與試驗數據很接近,相差在5%以內。接著對乘員熱舒適性進行分析,併使用平均空氣齡對艙內空氣新鮮度進行評價。結果錶明,在所設定的環境條件下,該轎車前排乘客感覺較熱,後排乘客感覺微熱,乘員艙空氣新鮮度較好。據此,對模型進行脩改併重新計算。結果顯示,乘員艙的熱舒適性得到瞭改善。
응용정체구해법계산기고우합전열문제,병고필료태양복사화벽면간열복사대속도장화온도장적영향,대모관교차차내삼유류장화열배경진행료수치방진,득도료속도장、온도장화PMV여PPD적분포。방진결과여시험수거흔접근,상차재5%이내。접착대승원열서괄성진행분석,병사용평균공기령대창내공기신선도진행평개。결과표명,재소설정적배경조건하,해교차전배승객감각교열,후배승객감각미열,승원창공기신선도교호。거차,대모형진행수개병중신계산。결과현시,승원창적열서괄성득도료개선。
By applying integrated method to solve the gas-solid coupling heat transfer problem with consid-erations of the effects of solar radiation and wall-to-wall heat radiation on velocity field and temperature field, a nu-merical simulation on the interior 3D flow field and thermal environment of a car is conducted with its velocity field, temperature field and the distributions of PMV and PPD obtained, which are very close to the results of test per-formed with a relative error within 5%. Then the thermal comfort of occupants is analyzed with the air freshness in passenger compartment evaluated by the mean age of air. The results indicate that in the environmental conditions set, while the air freshness in passenger compartment is relatively good, front passengers feel hot and rear passen-gers feel slightly hot. Accordingly the model is modified and re-simulated, resulting in improvement in the thermal comfort of passenger compartment.