工程車輛翼型熱管式散熱器性能研究
發(fā)布時間:2018-10-25 09:52
【摘要】:為了提升散熱器綜合性能,保持車輛工作性能穩(wěn)定,根據(jù)生產商提供的幾何參數(shù),應用計算流體力學對管片式散熱器單元性能進行數(shù)值計算,將結果與試驗數(shù)據(jù)對比,以驗證仿真模型的準確性.以盡量保持散熱面積為前提,提出以NACA0018翼型作為熱管特征,計算并對比兩者的JF因子,進一步討論其與NACA0012,NACA0021間的換熱系數(shù)和壓力損失差異.仿真結果表明:通過對散熱器單元體的數(shù)值模擬,可在一定誤差范圍內獲取散熱器冷側換熱系數(shù)和壓力損失;與扁平管翅片結構相比,仿真區(qū)間內翼型熱管翅片的JF因子略高,當流速達到12m/s時,JF評價因子高出約15.97%;與NACA0018相比,NACA0021具有較高的換熱系數(shù)和壓力損失,設計時應根據(jù)相對厚度酌情選擇.
[Abstract]:In order to improve the comprehensive performance of the radiator and keep the working performance of the vehicle stable, according to the geometric parameters provided by the manufacturer, the performance of the tubular radiator unit was calculated numerically by computational fluid dynamics, and the results were compared with the experimental data. To verify the accuracy of the simulation model. On the premise of keeping the heat dissipation area as far as possible, the NACA0018 airfoil is used as the heat pipe feature to calculate and compare their JF factors, and the difference of heat transfer coefficient and pressure loss between them and NACA0012,NACA0021 is further discussed. The simulation results show that the heat transfer coefficient and pressure loss of the cooling side of the radiator can be obtained within a certain error range by numerical simulation of the radiator unit, and the JF factor of the fin of the airfoil is slightly higher than that of the flat tube fin structure. When the flow rate reaches 12m/s, the evaluation factor of JF is about 15.97 higher than that of NACA0018. Compared with NACA0018, NACA0021 has higher heat transfer coefficient and pressure loss, and should be selected according to the relative thickness.
【作者單位】: 華中科技大學能源與動力工程學院;華北理工大學機械工程學院;吉林大學機械科學與工程學院;
【基金】:湖北省技術創(chuàng)新專項基金資助項目(2016AAA045) 國家科技支撐計劃資助項目(2013BAF07B04)
【分類號】:TU603;TK172
本文編號:2293351
[Abstract]:In order to improve the comprehensive performance of the radiator and keep the working performance of the vehicle stable, according to the geometric parameters provided by the manufacturer, the performance of the tubular radiator unit was calculated numerically by computational fluid dynamics, and the results were compared with the experimental data. To verify the accuracy of the simulation model. On the premise of keeping the heat dissipation area as far as possible, the NACA0018 airfoil is used as the heat pipe feature to calculate and compare their JF factors, and the difference of heat transfer coefficient and pressure loss between them and NACA0012,NACA0021 is further discussed. The simulation results show that the heat transfer coefficient and pressure loss of the cooling side of the radiator can be obtained within a certain error range by numerical simulation of the radiator unit, and the JF factor of the fin of the airfoil is slightly higher than that of the flat tube fin structure. When the flow rate reaches 12m/s, the evaluation factor of JF is about 15.97 higher than that of NACA0018. Compared with NACA0018, NACA0021 has higher heat transfer coefficient and pressure loss, and should be selected according to the relative thickness.
【作者單位】: 華中科技大學能源與動力工程學院;華北理工大學機械工程學院;吉林大學機械科學與工程學院;
【基金】:湖北省技術創(chuàng)新專項基金資助項目(2016AAA045) 國家科技支撐計劃資助項目(2013BAF07B04)
【分類號】:TU603;TK172
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