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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Jet Impingement Onto A Cylindrical Cavityeffect Of Jet Velocity On Heat Transfer And Skinrnfriction
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Jet Impingement Onto A Cylindrical Cavityeffect Of Jet Velocity On Heat Transfer And Skinrnfriction

机译：射流撞击圆柱速度对射流传热和换热的影响

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摘要

Purpose - The paper's aim is to provide information on heat transfer and flow characteristics for a jet emerging from a conical nozzle and impinging onto the cylindrical, which resembles the laserrnheating process, for researchers and graduate students working in the laser processing area, whichrncan help them to improve the understanding of the laser machining process.rnDesign/methodology/approach - A numerical scheme employing the control volume approach isrnintroduced to model the flow and heating situations. The effect of jet velocity on the heat transferrnrates and skin friction around the cylindrical cavity subjected to the jet impingement wasrninvestigated.rnFindings - Increasing jet velocity at nozzle exit enhances the heat transfer rates from the cavity wallrnand modifies the skin friction at cavity wall, which is more pronounced as the cavity depth increasesrnto lmm.rnResearch limitations/implications - The effects of nozzle cone angle on the flow structure andrnheat transfer characteristics were not examined, which perhaps limits the general usefulness of thernfindings.rnPractical implications - Very useful information are provided for the laser gas assistedrnprocessing, which has a practical importance in machining industry.rnOriginality/value - This paper provides original information for the effects of the gas jet velocityrnon the cooling rates of the laser produced cavity.
机译：目的-本文的目的是为在激光加工领域工作的研究人员和研究生提供有关从圆锥形喷嘴喷出并撞击到圆柱体（类似于激光加热过程）的射流的传热和流动特性的信息。设计/方法/方法-引入了采用控制量方法的数值方案，以对流动和加热情况进行建模。研究了射流速度对受射流撞击的圆柱腔周围传热速率和皮肤摩擦的影响。研究发现-喷嘴出口处射流速度的增加会提高腔壁的传热速率，并改变腔壁处的皮肤摩擦，这是研究的局限性/意义-没有研究喷嘴锥角对流动结构和传热特性的影响，这可能限制了研究成果的通用性。实用意义-为研究提供了非常有用的信息激光气体辅助加工，在机械加工工业中具有重要的现实意义。原创性/价值-本文提供了有关气体喷射速度对激光产生腔的冷却速率的影响的原始信息。

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