Computational Analysis of Droplet Mass and Size Effect on Mist/Air Impingement Cooling Performance

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ID: 20610
2013
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Abstract
Impingement cooling has been widely employed to cool gas turbine hot components such as combustor liners, combustor transition pieces, turbine vanes, and blades. A promising technology is proposed to enhance impingement cooling with water droplets injection. However, previous studies were conducted on blade shower head film cooling, and less attention was given to the transition piece cooling. As a continuous effort to develop a realistic mist impingement cooling scheme, this paper focuses on simulating mist impingement cooling under typical gas turbine operating conditions of high temperature and pressure in a double chamber model. Furthermore, the paper presents the effect of cooling effectiveness by changing the mass and size of the droplets. Based on the heat-mass transfer analogy, the results of these experiments prove that the mass of 3E – 3 kg/s droplets with diameters of 5–35 μm could enhance 90% cooling effectiveness and reduce 122 K of wall temperature. The results of this paper can provide guidance for corresponding experiments and serve as the qualification reference for future more complicated studies with convex surface cooling.
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yu2013computationaladvances Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yu, Zhenglei;Xu, Tao;Li, Junlou;Xu, Tianshuang;Yoshino, Tatsuo;
Journal advances in mechanical engineering
Year 2013
DOI
DOI not found
URL
https://doi.org/10.1155/2013/181856
Keywords Keywords not found

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