【摘要】：基于能量守恒定律,提出一種高溫、塑性變形條件下固體接觸換熱系數(shù)的測試方法。以此為基礎,開發(fā)試制了一套不同接觸條件下的固體接觸換熱系數(shù)的測試系統(tǒng)。設計了合理的實驗方案,并利用該測試系統(tǒng)測試了H13鋼與SA508-3鋼在不同初始界面溫差、接觸載荷下的接觸換熱系數(shù)。研究實測結果發(fā)現(xiàn),在高溫下(900℃以上),接觸換熱系數(shù)隨著接觸載荷增大而增大,且呈現(xiàn)較好的冪律關系;初始界面溫度對接觸換熱系數(shù)影響較小;初始界面溫差對冪指數(shù)的影響較小。實測溫度數(shù)據(jù)與數(shù)值模擬數(shù)據(jù)相吻合,表明該測試系統(tǒng)具有較好的精度與可靠性,具有工業(yè)實用價值。
[Abstract]:Based on the law of conservation of energy, a method for measuring the contact heat transfer coefficient of solids under high temperature and plastic deformation is presented. Based on this, a testing system of solid contact heat transfer coefficient under different contact conditions is developed. A reasonable experimental scheme was designed, and the contact heat transfer coefficient of H13 steel and SA508-3 steel under different initial interface temperature difference and contact load was measured by using the test system. The experimental results show that the contact heat transfer coefficient increases with the increase of contact load at high temperature (above 900 鈩，

本文編號：2338167