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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.3 pt.A; 20050606-09; Reno-Tahoe,NV(US) >EFFECT OF FEED CHANNEL WIDTH ON HEAT TRANSFER IN A RECTANGULAR DUCT WITH AN ARRAY OF OFF-SET JETS
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EFFECT OF FEED CHANNEL WIDTH ON HEAT TRANSFER IN A RECTANGULAR DUCT WITH AN ARRAY OF OFF-SET JETS

机译：进给通道宽度对带有偏置凸台的矩形管道传热的影响

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摘要

Experimental investigation was carried out to study the heat transfer characteristics in a rectangular duct cooled by an array of impinging jets. Air ejected from an array of orifices is aimed at the heated target surface and exits from the radial outlets. The effect of feed channel widths (5 ≤ H / d ≤ 9), jet to target plate distance (4 ≤ S/ d ≤ 8), outflow orientation and jet Reynolds numbers (9300 ≤ Re_j ≤ 18800) with a single array of equally spaced off-set orifice jets of diameter d = 0.5 cm on heat transfer was studied. Results indicated that the outflow orientation causing crossflow effect significantly affects the Nusselt number distributions on the target surface. Relatively higher Nusselt number values were obtained for the outflow orientation where the flow exits in both the directions. The feed channel width H / d = 7 gave relatively higher values of heat transfer compared to the other two feed channel widths. The jet-to-plate distance S / d = 4 resulted in higher heat transfer compared to the other jet-to-plate distances.
机译：进行了实验研究，以研究由一系列射流冷却的矩形管道中的传热特性。从一排孔口喷出的空气对准被加热的目标表面，并从径向出口排出。进料通道宽度（5≤H / d≤9），射流到目标板的距离（4≤S / d≤8），流出方向和射流雷诺数（9300≤Re_j≤18800）的影响研究了在传热过程中直径d = 0.5 cm的等距偏移孔口射流。结果表明，引起交叉流效应的流出方向显着影响目标表面上的Nusselt数分布。对于在两个方向都流出的流出方向，可以获得相对较高的努塞尔特值。与其他两个进料通道宽度相比，进料通道宽度H / d = 7给出的传热值相对较高。与其他喷嘴到板的距离相比，喷嘴到板的距离S / d = 4导致更高的热传递。

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