High Resolution Experimental and Computational Methods for Modelling Multiple Row Effusion Cooling Performance
| Autor: | Anthony John Rawlinson, Shaun Wei Tang, Alexander Murray, Tsun Holt Wong, Peter T. Ireland |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
020209 energy lcsh:Mechanical engineering and machinery Energy Engineering and Power Technology Aerospace Engineering Pressure-sensitive paint 02 engineering and technology Computational fluid dynamics Tracking (particle physics) 01 natural sciences Turbine 010305 fluids & plasmas Superposition principle 0103 physical sciences effusion cooling heat transfer 0202 electrical engineering electronic engineering information engineering lcsh:TJ1-1570 Jet (fluid) business.industry Mechanical Engineering superposition Scalar (physics) turbine cooling pressure sensitive paint Mechanics Heat transfer business |
| Zdroj: | International Journal of Turbomachinery, Propulsion and Power, Vol 3, Iss 1, p 4 (2018) International Journal of Turbomachinery, Propulsion and Power; Volume 3; Issue 1; Pages: 4 Scopus-Elsevier |
| ISSN: | 2410-4833 |
| DOI: | 10.29008/etc2017-130 |
| Popis: | The continuing rise in turbine entry temperatures has necessitated the development of ever-more advanced cooling techniques. Effusion cooling is an example of such a system and is characterised by a high density of film cooling holes that operate at low blowing ratios, thereby achieving high overall cooling effectiveness. This paper presents both an experimental and computational investigation into the cooling performance of effusion systems. Two flat-plate geometries (with primary hole pitches of 3.0D and 5.75D) are experimentally investigated via a pressure sensitive paint technique yielding high resolution film effectiveness distributions via heat-mass transfer analogy. A computational fluid dynamics (CFD) scalar tracking method was used to model the setup computationally with the results comparing favourably to those obtained from the experiments. The CFD domain was modified to assess the cooling performance from a single film hole ejection. A superposition method was developed and applied to the resulting two-dimensional film effectiveness distribution that quickly yielded data for an array of closely-packed holes, allowing a rapid assessment of a multi-hole effusion type setup. The method produced satisfactory results at higher pitches, but at lower pitches, high levels of jet interactions reduced the performance of the superposition method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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