The Effects of Coolant Pipe Geometry and Flow Conditions on Turbine Blade Film Cooling

Muhammad AKBAR

doi:https://doi.org/10.18186/journal-of-thermal-engineering.314165

Article Details

The Effects of Coolant Pipe Geometry and Flow Conditions on Turbine Blade Film Cooling

Authors:

Muhammad AKBAR

Publisher:

Yildiz Technical University

Main Topics:

Applied physics

Journal:

Journal of Thermal Engineering 2017 Vol.3 Issue 3, pp.1196-1210

Document Type:

Article

Publication Date:

6/2017

Document Language:

Turkish

Document ID (Org No.):

2000506422

Frequency:

Bimonthly

eISSN:

2148-7847

DOI:

https://doi.org/10.18186/journal-of-thermal-engineering.314165

Abstract:

 


The performance of gas turbine engines can be improved by increasing the inlet gas temperature. Turbine blades
can be damaged by high gas temperature, unless additional cooling mechanisms are incorporated to maintain the
blades below an acceptable temperature limit. Film cooling techniques are often used to cool the blades to avoid
damages. The performance of film cooling depends on several parameters, however. In this paper past research
on film cooling is reviewed and areas in need of further investigation are identified. Computational fluid dynamics
(CFD) simulations are then conducted on the widely-used single-hole film cooling arrangements in which coolant
jets are injected into air flows inside a straight channel before issuing onto the blades. Cooling pipe-blade
configurations and flow conditions are varied and the resulting flow hydrodynamics are examined. Counter
rotating vortex pairs (CRVPs) formed in the flow strongly influence the film cooling performance. Small coolant
inclination angles, exit holes enlargement in span wise direction, higher injected fluid density, and higher injectedambient
fluid velocity ratios are all found to maintain the CRVPs away from each other and close to wall - both of
which promote cooling. Pipe curvature can be used for enhancing cooling by exploiting the centrifugal force effect.

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Article Details

The Effects of Coolant Pipe Geometry and Flow Conditions on Turbine Blade Film Cooling

Authors: Muhammad AKBAR

Publisher: Yildiz Technical University

Main Topics: Applied physics

Journal: Journal of Thermal Engineering 2017 Vol.3 Issue 3, pp.1196-1210

Document Type: Article

Publication Date: 6/2017

Document Language: Turkish

Document ID (Org No.): 2000506422

Frequency: Bimonthly

eISSN: 2148-7847

DOI: https://doi.org/10.18186/journal-of-thermal-engineering.314165

Issues

Authors:

Muhammad AKBAR

Publisher:

Yildiz Technical University

Main Topics:

Applied physics

Journal:

Journal of Thermal Engineering 2017 Vol.3 Issue 3, pp.1196-1210

Document Type:

Article

Publication Date:

6/2017

Document Language:

Turkish

Document ID (Org No.):

2000506422

Frequency:

Bimonthly

eISSN:

2148-7847

DOI:

https://doi.org/10.18186/journal-of-thermal-engineering.314165