Determination of rewetting on hot horizontal surface with water jet impingement through a sharp edge nozzle
作者： Chitranjan Agrawal , Ravi Kumar , Akhilesh Gupta , Barun Chatterjee
DOI: 10.1016/J.IJTHERMALSCI.2013.03.010
关键词: Jet (fluid) 、 Materials science 、 Surface (mathematics) 、 Nozzle 、 Edge (geometry) 、 Mechanics 、 Wetting 、 Reynolds number 、 Thermodynamics 、 Range (particle radiation) 、 Stagnation point
摘要: Abstract The rewetting phenomenon was experimentally investigated for the hot horizontal stainless steel surface of 0.25 mm thickness and 800 ± 10 °C initial temperature. round water jet 2.5 mm diameter at 22 ± 1 °C temperature injected through a sharp edge nozzle. investigation done stagnation point to 12 mm (≈5d) radial distance Reynolds number varied in range 5000–24,000. phenomena during transient cooling accessed on basis temperature, wetting delay, speed maximum heat flux. It has been observed that with rise number, performance increased entire measured spatial locations. However, downstream region delayed occurred reduced as compared region. flux is highest 2.1–2.45 MW/m2. correlation developed front predicts 85 percent experimental data within an error band ±20 90 ±10 percent.
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