Total-coverage discrete hole wall cooling

Hyung Hee Cho, Richard J. Goldstein

Research output: Contribution to journalConference article

Abstract

The heat/mass transfer for flow is studied through perforated plates for application to combustor wall and turbine blade film cooling. The results indicate that heat/mass transfer coefficients inside the hole surface vary significantly due to flow separation and reattachment. The transfer coefficient near the reattachment point is about four and half times that for a fully developed circular tube flow. The heat/mass transfer coefficient on the leeward surface has the same order as that on the windward surface because of a strong recirculation flow between neighboring jets from that array holes. For flow through in-line layers, the transfer coefficients affected by the gap spacing is approximately 100% higher on the windward surface of the second wall is about 20% lower on the side inside hole surface than that with a single layer.

Original languageEnglish
JournalAmerican Society of Mechanical Engineers (Paper)
Publication statusPublished - 1995 Jan 1

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Cooling
Mass transfer
Perforated plates
Flow separation
Pipe flow
Combustors
Turbomachine blades
Turbines
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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abstract = "The heat/mass transfer for flow is studied through perforated plates for application to combustor wall and turbine blade film cooling. The results indicate that heat/mass transfer coefficients inside the hole surface vary significantly due to flow separation and reattachment. The transfer coefficient near the reattachment point is about four and half times that for a fully developed circular tube flow. The heat/mass transfer coefficient on the leeward surface has the same order as that on the windward surface because of a strong recirculation flow between neighboring jets from that array holes. For flow through in-line layers, the transfer coefficients affected by the gap spacing is approximately 100{\%} higher on the windward surface of the second wall is about 20{\%} lower on the side inside hole surface than that with a single layer.",
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Total-coverage discrete hole wall cooling. / Cho, Hyung Hee; Goldstein, Richard J.

In: American Society of Mechanical Engineers (Paper), 01.01.1995.

Research output: Contribution to journalConference article

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AU - Goldstein, Richard J.

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N2 - The heat/mass transfer for flow is studied through perforated plates for application to combustor wall and turbine blade film cooling. The results indicate that heat/mass transfer coefficients inside the hole surface vary significantly due to flow separation and reattachment. The transfer coefficient near the reattachment point is about four and half times that for a fully developed circular tube flow. The heat/mass transfer coefficient on the leeward surface has the same order as that on the windward surface because of a strong recirculation flow between neighboring jets from that array holes. For flow through in-line layers, the transfer coefficients affected by the gap spacing is approximately 100% higher on the windward surface of the second wall is about 20% lower on the side inside hole surface than that with a single layer.

AB - The heat/mass transfer for flow is studied through perforated plates for application to combustor wall and turbine blade film cooling. The results indicate that heat/mass transfer coefficients inside the hole surface vary significantly due to flow separation and reattachment. The transfer coefficient near the reattachment point is about four and half times that for a fully developed circular tube flow. The heat/mass transfer coefficient on the leeward surface has the same order as that on the windward surface because of a strong recirculation flow between neighboring jets from that array holes. For flow through in-line layers, the transfer coefficients affected by the gap spacing is approximately 100% higher on the windward surface of the second wall is about 20% lower on the side inside hole surface than that with a single layer.

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