Computation of synthetic surface heat transfer coefficient of 7B50 ultra-high-strength aluminum alloy during spray quenching

2018 ◽  
Vol 28 (5) ◽  
pp. 989-997 ◽  
Author(s):  
Lei KANG ◽  
Gang ZHAO ◽  
Ni TIAN ◽  
Hai-tao ZHANG
Keyword(s):  
Heat Transfer ◽  
Aluminum Alloy ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
High Strength ◽  
Surface Heat ◽  
Surface Heat Transfer ◽  
High Strength Aluminum Alloy ◽  
Surface Heat Transfer Coefficient

Effect of Cladding Material on Residual Stress in Quenched Aluminum Alloy Plate

2011 ◽  
Vol 311-313 ◽  
pp. 702-706
Author(s):  
Hai Gong ◽  
Yun Xin Wu ◽  
Zhong Huai Wu ◽  
Yi Hua Li
Keyword(s):  
Heat Transfer ◽  
Residual Stress ◽  
Aluminum Alloy ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Surface Heat ◽  
Alloy Plate ◽  
Surface Heat Transfer ◽  
Surface Heat Transfer Coefficient ◽  
Cladding Material

Using finite element method, a quenching analysis of 7075 aluminum alloy thick plate is carried out. The effect of surface heat transfer coefficient and plate thickness on residual stress, and the effect of cladding material on residual stress are discussed. It shows that the bigger surface heat transfer coefficient or thickness is, the bigger the residual stress is, and the residual stress significantly reduces while the cladding material exists. Experiments validated the simulation results.

The Research on the Key Factor Affect the Precision in Stress Analysis for the Rotor of Steam Turbine

2013 ◽  
Vol 275-277 ◽  
pp. 83-86
Author(s):  
Chun Lin Zhang ◽  
Nian Su Hu ◽  
Wen Yang ◽  
Jian Mei Wang ◽  
Min Li ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Numerical Calculation ◽  
Transfer Coefficient ◽  
Stress Analysis ◽  
Surface Heat ◽  
Flow State ◽  
Surface Heat Transfer ◽  
Surface Heat Transfer Coefficient ◽  
Key Factor

With the development of the power grid, the proportion of large capacity unit is increasing rapidly. It requires a more in-depth study on the reliability of the unit, especially for the unit adjusting the peak. This paper concerned on the research of the surface heat transfer coefficient, which is the key factor affect the precision in thermal stress analysis. The surface heat transfer coefficient is obtained via the numerical calculation for the steam’s flow state and the transient heat transfer between rotor. This paper mainly describes the steam’s flow state and the transient heat transfer with the steam seal, and the results show that the direct numerical calculation is resultful in this subject.

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