Optimal design of impinging jets in an impingement/effusion cooling system

Kyung Min Kim; Hokyu Moon; Jun Su Park; Hyung Hee Cho

doi:10.1016/j.energy.2013.12.024

Optimal design of impinging jets in an impingement/effusion cooling system

Kyung Min Kim, Hokyu Moon, Jun Su Park, Hyung Hee Cho

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

To design an impingement/effusion cooling system that realizes the lowest thermal stress in an impingement/effusion cooling system, we conducted thermal analysis and optimization using a second-order response surface method. The optimal impinging jet system was based on four design variables: the spacing between the impinging jets and effusion holes (1.0≤Sp≤5.0), the channel height from impinging jet to effusion surface (1.0≤Ht≤3.0), the mass flux ratio of the crossflow to the impinging jet flow (0.1≤G^*≤1.3,-1.3≤G^*≤-0.1), and the main flow temperature (1100K≤T_m≤1800K). We considered several cases involving inlined and staggered jets, and two cooling flow direction: the same direction and reverse direction. Response surface functions were constructed to determine the impinging jet system with the lowest value among the maximum stresses calculated within the design ranges. In each case, the response surface function for determining the maximum stress was composed of combinations of the four design variables. These functions can be used to find the optimum design point that achieves the lowest stress around film cooling holes in hot components of a gas turbine.

Original language	English
Pages (from-to)	839-848
Number of pages	10
Journal	Energy
Volume	66
DOIs	https://doi.org/10.1016/j.energy.2013.12.024
Publication status	Published - 2014 Mar 1

Bibliographical note

Funding Information:
This work was also supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0017673 ).

Funding Information:
This work was supported by the Power Generation & Electricity Delivery program and the Human Resources Development program (No.20134030200200) of the Korean Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government Ministry of Trade, Industry and Energy .

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Modelling and Simulation
Renewable Energy, Sustainability and the Environment
Building and Construction
Fuel Technology
Energy Engineering and Power Technology
Pollution
Mechanical Engineering
Energy(all)
Management, Monitoring, Policy and Law
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.energy.2013.12.024

Cite this

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abstract = "To design an impingement/effusion cooling system that realizes the lowest thermal stress in an impingement/effusion cooling system, we conducted thermal analysis and optimization using a second-order response surface method. The optimal impinging jet system was based on four design variables: the spacing between the impinging jets and effusion holes (1.0≤Sp≤5.0), the channel height from impinging jet to effusion surface (1.0≤Ht≤3.0), the mass flux ratio of the crossflow to the impinging jet flow (0.1≤G*≤1.3,-1.3≤G*≤-0.1), and the main flow temperature (1100K≤Tm≤1800K). We considered several cases involving inlined and staggered jets, and two cooling flow direction: the same direction and reverse direction. Response surface functions were constructed to determine the impinging jet system with the lowest value among the maximum stresses calculated within the design ranges. In each case, the response surface function for determining the maximum stress was composed of combinations of the four design variables. These functions can be used to find the optimum design point that achieves the lowest stress around film cooling holes in hot components of a gas turbine.",

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note = "Funding Information: This work was also supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0017673 ). Funding Information: This work was supported by the Power Generation & Electricity Delivery program and the Human Resources Development program (No.20134030200200) of the Korean Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government Ministry of Trade, Industry and Energy . ",

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N2 - To design an impingement/effusion cooling system that realizes the lowest thermal stress in an impingement/effusion cooling system, we conducted thermal analysis and optimization using a second-order response surface method. The optimal impinging jet system was based on four design variables: the spacing between the impinging jets and effusion holes (1.0≤Sp≤5.0), the channel height from impinging jet to effusion surface (1.0≤Ht≤3.0), the mass flux ratio of the crossflow to the impinging jet flow (0.1≤G*≤1.3,-1.3≤G*≤-0.1), and the main flow temperature (1100K≤Tm≤1800K). We considered several cases involving inlined and staggered jets, and two cooling flow direction: the same direction and reverse direction. Response surface functions were constructed to determine the impinging jet system with the lowest value among the maximum stresses calculated within the design ranges. In each case, the response surface function for determining the maximum stress was composed of combinations of the four design variables. These functions can be used to find the optimum design point that achieves the lowest stress around film cooling holes in hot components of a gas turbine.

AB - To design an impingement/effusion cooling system that realizes the lowest thermal stress in an impingement/effusion cooling system, we conducted thermal analysis and optimization using a second-order response surface method. The optimal impinging jet system was based on four design variables: the spacing between the impinging jets and effusion holes (1.0≤Sp≤5.0), the channel height from impinging jet to effusion surface (1.0≤Ht≤3.0), the mass flux ratio of the crossflow to the impinging jet flow (0.1≤G*≤1.3,-1.3≤G*≤-0.1), and the main flow temperature (1100K≤Tm≤1800K). We considered several cases involving inlined and staggered jets, and two cooling flow direction: the same direction and reverse direction. Response surface functions were constructed to determine the impinging jet system with the lowest value among the maximum stresses calculated within the design ranges. In each case, the response surface function for determining the maximum stress was composed of combinations of the four design variables. These functions can be used to find the optimum design point that achieves the lowest stress around film cooling holes in hot components of a gas turbine.

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Optimal design of impinging jets in an impingement/effusion cooling system

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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