Experimental investigations of the effect of scheme exit height and double row injection on the film cooling performance of a micro tangential jet scheme, part i: Pressure side

O. Hassan, Ibrahim Hassan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents experimental investigations of the effect of scheme exit height and double jet injection on the film cooling performance of a Micro- Tangential-Jet (MTJ) scheme. The investigations were conducted over a gas turbine vane pressure side using the transient Thermochromic Liquid Crystal technique. The suction side investigations are presented in Part II of the present paper. The MTJ scheme is a microshaped scheme designed so that the micro-sized secondary jet is supplied tangentially to the vane surface. The scheme combines the benefits of micro jets and tangential injection. In order to investigate the effect of scheme exit height, one row of the MTJ scheme with 1.0 hole diameter exit height and another row with 1.5 hole diameter exit height were investigated. Meanwhile, to investigate the effect of double injection, one row of the MTJ scheme in staggered arrangement with one row of fan-shaped scheme was investigated. The investigations were conducted at various blowing ratios, calculated based on the scheme exit area. The average density ratio, turbulence intensity and Reynolds number were 0.93, 8.5, and 1.4E+5, respectively. The investigations showed that the smaller the exit height, the better the film cooling performance. Meanwhile, double injecting the secondary stream from MTJ and shaped schemes did not result in significant film cooling enhancement due to the enhanced turbulence over the vane surface.

Original languageEnglish
Title of host publicationASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume2015-January
ISBN (Electronic)9780791856604
DOIs
Publication statusPublished - 2015
EventASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum - San Diego, United States
Duration: 28 Jun 20152 Jul 2015

Other

OtherASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum
CountryUnited States
CitySan Diego
Period28/6/152/7/15

Fingerprint

Cooling
Turbulence
Blow molding
Liquid crystals
Fans
Gas turbines
Reynolds number

Keywords

  • Effectiveness
  • Film cooling
  • Gas turbines
  • Heat transfer coefficient
  • Micro film cooling
  • Net heat flux reduction
  • Tangential injection

ASJC Scopus subject areas

  • Mechanical Engineering
  • Energy Engineering and Power Technology

Cite this

Hassan, O., & Hassan, I. (2015). Experimental investigations of the effect of scheme exit height and double row injection on the film cooling performance of a micro tangential jet scheme, part i: Pressure side. In ASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum (Vol. 2015-January). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/POWER201549131

Experimental investigations of the effect of scheme exit height and double row injection on the film cooling performance of a micro tangential jet scheme, part i : Pressure side. / Hassan, O.; Hassan, Ibrahim.

ASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. Vol. 2015-January American Society of Mechanical Engineers (ASME), 2015.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hassan, O & Hassan, I 2015, Experimental investigations of the effect of scheme exit height and double row injection on the film cooling performance of a micro tangential jet scheme, part i: Pressure side. in ASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. vol. 2015-January, American Society of Mechanical Engineers (ASME), ASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum, San Diego, United States, 28/6/15. https://doi.org/10.1115/POWER201549131
Hassan O, Hassan I. Experimental investigations of the effect of scheme exit height and double row injection on the film cooling performance of a micro tangential jet scheme, part i: Pressure side. In ASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. Vol. 2015-January. American Society of Mechanical Engineers (ASME). 2015 https://doi.org/10.1115/POWER201549131
Hassan, O. ; Hassan, Ibrahim. / Experimental investigations of the effect of scheme exit height and double row injection on the film cooling performance of a micro tangential jet scheme, part i : Pressure side. ASME 2015 Power Conference, POWER 2015, collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. Vol. 2015-January American Society of Mechanical Engineers (ASME), 2015.
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