CAJ | 학술논문

在改进Hamasaiid模型的基础上提出了新的金属型铸造界面换热系数峰值h max预测模型，该模型引入表面张力参数，定量研究其对界面换热的影响。采用A356铝合金金属型重力铸造实验对模型进行验证。结果表明：反求计算的hmax约为5944 W/(m2?K)，采用Hamasaiid模型计算的hmax约为7987 W/(m2?K)，误差约为34%；新模型未考虑表面张力时计算的hmax约为6228 W/(m2?K)，误差约为5%，考虑表面张力时计算的hmax约为5992 W/(m2?K)，误差约为1%。新模型计算精度有较大提升，计算结果与反求结果具有很好的一致性，表面张力对计算精度有一定影响。
재개진Hamasaiid모형적기출상제출료신적금속형주조계면환열계수봉치h max예측모형，해모형인입표면장력삼수，정량연구기대계면환열적영향。채용A356려합금금속형중력주조실험대모형진행험증。결과표명：반구계산적hmax약위5944 W/(m2?K)，채용Hamasaiid모형계산적hmax약위7987 W/(m2?K)，오차약위34%；신모형미고필표면장력시계산적hmax약위6228 W/(m2?K)，오차약위5%，고필표면장력시계산적hmax약위5992 W/(m2?K)，오차약위1%。신모형계산정도유교대제승，계산결과여반구결과구유흔호적일치성，표면장력대계산정도유일정영향。
The new predictive model of metal casting interfacial heat transfer coefficient peak value (hmax) was proposed by improving Hamasaiid’s model. The surface tension was introduced into the model, its impact on the interfacial heat transfer was quantitatively studied. A356 aluminum alloy gravity die casting experiments were performed in order to validate the model. The results show that thehmax value calculated by the inverse heat conduction method is about 5944 W/(m2?K), the result of Hamasaiid’s model is about 7987 W/(m2?K), and the error is about 34%. Thehmax value calculated by the new model is about 6228 W/(m2?K), and the error is about 5%, but if the surface tension is considered, the result is about 5992 W/(m2?K), and the error is about 1%. The calculation accuracy of the new model was greatly improved, the calculation results are in good agreement with the inverse results. The surface tension has a certain impact on the calculation accuracy.