农机化研究
農機化研究
농궤화연구
Journal of Agricultural Mechanization Research
2016年
5期
204-207
,共4页
塑料大棚%间距%温度场%CFD模拟
塑料大棚%間距%溫度場%CFD模擬
소료대붕%간거%온도장%CFD모의
plastic greenhouse%distance%temperature distribution%CFD simulation
为了研究多个塑料钢管大棚组成的温室群环境温度分布情况,采用标准k-ε湍流模型和DO辐射模型建立相应的温室群数值模型,在自然通风条件下对塑料钢管大棚内温度分布进行了CFD分析和试验验证.结果显示:CFD模拟值与实测值吻合性良好,平均相对误差为4.2%,验证了所建CFD模型的可行性.采用此模型分析了大棚间距对棚内温度分布的影响,结果表明:增加大棚间距能够降低后排室内的平均温度,提高温度分布的均匀性,减小温室之间的平均温差.
為瞭研究多箇塑料鋼管大棚組成的溫室群環境溫度分佈情況,採用標準k-ε湍流模型和DO輻射模型建立相應的溫室群數值模型,在自然通風條件下對塑料鋼管大棚內溫度分佈進行瞭CFD分析和試驗驗證.結果顯示:CFD模擬值與實測值吻閤性良好,平均相對誤差為4.2%,驗證瞭所建CFD模型的可行性.採用此模型分析瞭大棚間距對棚內溫度分佈的影響,結果錶明:增加大棚間距能夠降低後排室內的平均溫度,提高溫度分佈的均勻性,減小溫室之間的平均溫差.
위료연구다개소료강관대붕조성적온실군배경온도분포정황,채용표준k-ε단류모형화DO복사모형건립상응적온실군수치모형,재자연통풍조건하대소료강관대붕내온도분포진행료CFD분석화시험험증.결과현시:CFD모의치여실측치문합성량호,평균상대오차위4.2%,험증료소건CFD모형적가행성.채용차모형분석료대붕간거대붕내온도분포적영향,결과표명:증가대붕간거능구강저후배실내적평균온도,제고온도분포적균균성,감소온실지간적평균온차.
In order to research the temperature distribution in multi plastic pipe greenhouses, the standard k-εturbulent model and DO radiation model were used for homologous numerical model.The measurement was conducted to validate the numerical model and CFD analysis was done for temperature distribution under natural ventilation.The results showed the simulated values and measured values matched well, the average relative error was 4.2%.Then the numerical model was used to predict the temperature distribution for different distances between greenhouses, the results showed increasing the distance between greenhouses could reduce the average temperature in the leeward greenhouse and increase homoge -neity.The difference in average temperature among greenhouses cloud also decrease.