Large Eddy Simulations of film-cooling flows with a micro-ramp vortex generator

Aaron F. Shinn, Surya Pratap Vanka

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

Abstract

Large Eddy Simulations were performed to study the effect of a micro-ramp on an inclined turbulent jet interacting with a cross-flow in a film-cooling configuration. The micro-ramp vortex generator is placed downstream of the film-cooling jet. Changes in vortex structure and film-cooling effectiveness are evaluated and the genesis of the counter-rotating vortex pair in the jet is discussed. Results are reported with the jet modeled using a plenum/pipe configuration. This configuration was designed based on previous wind tunnel experiments at NASA Glenn Research Center, and the present results are meant to supplement those experiments. It is found that the micro-ramp improves film-cooling effectiveness by generating near-wall counter-rotating vortices which help entrain coolant from the jet and transport it to the surface. The pair of vortices generated by the micro-ramp are of opposite sense to the vortex pair embedded in the jet.

Original languageEnglish (US)
Title of host publicationASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Pages439-451
Number of pages13
Volume6
EditionPARTS A AND B
StatePublished - 2011
EventASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 - Denver, CO, United States
Duration: Nov 11 2011Nov 17 2011

Other

OtherASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
CountryUnited States
CityDenver, CO
Period11/11/1111/17/11

Fingerprint

Gas generators
Large eddy simulation
Vortex flow
Cooling
Coolants
Wind tunnels
NASA
Experiments
Pipe

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Shinn, A. F., & Vanka, S. P. (2011). Large Eddy Simulations of film-cooling flows with a micro-ramp vortex generator. In ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 (PARTS A AND B ed., Vol. 6, pp. 439-451)

Large Eddy Simulations of film-cooling flows with a micro-ramp vortex generator. / Shinn, Aaron F.; Vanka, Surya Pratap.

ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011. Vol. 6 PARTS A AND B. ed. 2011. p. 439-451.

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

Shinn, AF & Vanka, SP 2011, Large Eddy Simulations of film-cooling flows with a micro-ramp vortex generator. in ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011. PARTS A AND B edn, vol. 6, pp. 439-451, ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011, Denver, CO, United States, 11/11/11.
Shinn AF, Vanka SP. Large Eddy Simulations of film-cooling flows with a micro-ramp vortex generator. In ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011. PARTS A AND B ed. Vol. 6. 2011. p. 439-451
Shinn, Aaron F. ; Vanka, Surya Pratap. / Large Eddy Simulations of film-cooling flows with a micro-ramp vortex generator. ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011. Vol. 6 PARTS A AND B. ed. 2011. pp. 439-451
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