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http://dx.doi.org/10.6108/KSPE.2016.20.4.094

An Experimental Study on Pressure Loss in Straight Cooling Channels  

Yoon, Wonjae (School of Mechanical Engineering, Chungbuk National University)
Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University)
Kim, Hongjip (Department of Mechanical Engineering, Chungnam National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.20, no.4, 2016 , pp. 94-103 More about this Journal
Abstract
A regeneratively-cooled channel in a liquid rocket engine is used to effectively cool a combustion chamber inner wall from hot combustion gas, and the heat transfer/pressure loss characteristics should be predicted in advance to design cooling channels. In the present research, five cooling channels with different geometric dimensions were designed and the channels were respectively manufactured using cutter and endmill. By changing coolant velocity and downstream pressure, the effects of manufacturing method, channel shape, and flow condition on pressure losses were experimentally investigated and the results were compared with the analytical results. At same channel shape and flow condition, the pressure loss in the channel machined by the cutter was lower than that by the endmill. It was also found that the pressure loss ratio between the experimental result and the analytical data changed with the channel shape and flow condition.
Keywords
Regenerative Cooling; Cooling Channel; Pressure Loss; Friction Coefficient; Surface Roughness;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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