The Effect of the Structure of Collection Loop on Two-Phase Flow Field in Quenching Furnace

Abstract:

In order to analyses the effect of structure of collection loop on two-phase flow field in quenching furnace, the complex flow field in furnace for mixture of Nitrogen and spray water ejecting quenching under normal pressure and high velocity is numerically simulated with Mixture model of two-phase flow by CFD software FLUENT. Different inlet velocity, different volume percent of spray water, different velocity differences between Nitrogen and spray water, and different angle and dimension of collection loop affected on outlet velocity are analyzed. The research results show that the flow field is really complex, and around inner and outside canister and collection loop back flow exists. The angle of collection loop has less effect on outlet velocity, and the inner diameter of collection loop has more effect on outlet velocity. The simulation results show that the furnace can accelerate the flow of quenching media, which can cool specimen quickly.

• Periodical: Applied Mechanics and Materials (Volumes 48-49)
• Pages: 1245-1249
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.48-49.1245
• Online since: February 2011
• Authors: Bao Dong Shao, He Ming Cheng, Jian Yun Li, Zi Liang Li, Li Jun Hou, Jie Hou, Li Feng Wang, Dong Fang Ding, Chong Tian
• Keywords: Collection Loop, Gas Quenching, Nitrogen-Spray Water Mixture, Numerical Simulation, Two-Phase Flow

References

[1] CHENG H. M., XIE J. B., LI J. Y. , in: Comparison of properties of 9SiCr alloy steel in various quenching media after quenching. Journal of Aeronautical Materials, 2004, 24(4): 14-17.

[2] Faura F., Campo A., Zamora B. , in: A mixture of pure gases that produce maximum heat transfer characteristics for quenching . J. Mater. Eng. Perf., 1998, 7(3): 420-424.

DOI: 10.1361/105994998770347873

[3] Laumen C., Midea S. J., Lubben T., Hoffmann F. and Mayr P. , in: Measured heat transfer coefficients by using hydrogen as quenchant in comparison with helium and nitrogen, In SM heat treatment conference. Accelerated Cooling/Direct Quenching of Steels. Indianapolis, Indiana, USA, 1997, 199-206.

[4] MEI G H, MENG H J, WU R Y, CI Y, XIE Z, in: Analysis of spray cooling heat transfer coefficient on high temperature surface. Energy for Metallurgical Industry, 2004, 23(6): 18-22.

[5] GAO S, QU W, YAO W, in: Flow and heat transfer of droplet impinging on hot flat surface during spray cooling. Journal of Engineering Thermophysics, 2007, 28(suppl. 1): 221-226.

[6] LIU Z H(1997) , in: Experimental study on the boiling critical heat flux of mist cooling. Journal of Shanghai Jiaotong University, 1997, 31(2): 61-65.

[7] ZHANG H X, MIAO J Y, YAO W, SHAO X G, FAN H L , in: Steady-state characteristics of a closed-loop spray cooling system. Chinese Space Science and Technology, 2009, 4: 61-68.

[8] DU F S, ZHANG F, HUANG H G, LI G R, in: Numerical simulation of spray quenching process for large-scale forgings. Heat Treatment of Metals, 2008, 33(5): 35-38.

[9] FRANK, P., ECKEHARD, S. , in: Transient Measurement of Heat Transfer in Metal Quenching with Atomized Spray. Experimental Thermal and Fluid Science, 2004, 28: 607-615.

DOI: 10.1016/j.expthermflusci.2003.09.004

[10] OLIVEIRA M.S. A, SOUSA A.C.M. , in: Neural Network of Experimental Data for Air/Water Spray Cooling. Journal Materials Processing Technology, 2001, 113: 439-445.

DOI: 10.1016/s0924-0136(01)00646-x