Title: Experimental study on the cooling effects of cryogenic pneumatic mist jet impinging cooling method

Authors: Q.L. An, Y.C. Fu, J.H. Xu

Addresses: School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. ' College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. ' College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Abstract: Grinding, characterised by its high specific energy consumption, may generate high grinding zone temperature. These can cause thermal damage to the ground surface and poor surface integrity, especially in the grinding of difficult-to-machine materials. Conventional cooling methods based on large amounts of water-oil emulsions can be both ineffective and environmentally unacceptable. Here a new high efficiency cooling technology – Cryogenic Pneumatic Mist Jet Impinging (CPMJI) cooling technology is offered. It utilises the high penetrative power of fast cryogenic air jet combined with a little quantity of water of 0°C to greatly improve heat transfer effects in the machining zone. Experimental results, including heat transfer experiments and grinding experiments, indicate that CPMJI has strong cooling ability and can offer better cooling effects compared to cold air jet and traditional flood cooling method in the grinding of titanium alloy.

Keywords: high efficiency cooling; heat transfer; grinding temperature; CPMJI cryogenic pneumatic mist; jet impingement; cryogenic air jets; titanium alloy.

DOI: 10.1504/IJAT.2008.020559

International Journal of Abrasive Technology, 2008 Vol.1 No.3/4, pp.241 - 250

Available online: 30 Sep 2008 *

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