Experimental and numerical investigation of unsteady impingement cooling within a blade leading edge passage

Yang, Li; Ren, Jing; Jiang, Hongde; Ligrani, Phillip M.

doi:10.1016/j.ijheatmasstransfer.2013.12.006

Cited by 74 publications

(16 citation statements)

References 18 publications

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“…This research activity is a collaborative effort between Dr. Ligrani, Professor Jing Ren, Professor Hongde Jiang, and associated graduate students of the Institute for Gas Turbines of Beijing Tsinghua University of the P. R. China. Of interest is experimental and numerical investigation of unsteady impingement cooling within a blade leading edge passage, 44 as well as unsteady structure and development of both laminar and turbulent impingement jets, including Kelvin-Helmholtz vortex development. 45,46 Different turbulence models are also assessed in regard to predictions of narrow passage flows with impingement jets, 47 and with pin fin arrays.…”

Section: Internal Passage Heat Transfer Augmentation Methods and Assomentioning

confidence: 99%

Propulsion Research and Academic Programs at the University of Alabama in Huntsville - 2018

Frederick

Ligrani

Thomas

2018

2018 Joint Propulsion Conference

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The UAH Propulsion Research Center (PRC) is beginning its 26 th year at the University of Alabama in Huntsville (UAH). The mission of the Propulsion Research Center is to provide an environment that connects the academic research community with the needs and concerns of the propulsion community while promoting an interdisciplinary approach to solving propulsion problems. This paper describes highlights from the research and academic programs associated with the center over the past eighteen months. Academic highlights include the offering of new graduate courses in liquid rocket engineering and solid rocket combustion instability. Research highlights include a new supersonic wind tunnel capability and a new program in nuclear thermal propulsion systems engineering. In the 2016 fiscal year, total research expenditures rose to $1.563 million and four Ph.D., eleven master's students, and numerous undergraduate students obtained degrees in conjunction with the center. The center continues to be a resource for both fundamental and applied research as well as a significant contributor to workforce development in the propulsion and energy field.

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Section: Internal Passage Heat Transfer Augmentation Methods and Assomentioning

confidence: 99%

Propulsion Research and Academic Programs at the University of Alabama in Huntsville - 2018

Frederick

Ligrani

Thomas

2018

2018 Joint Propulsion Conference

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“…Each turbulence model possesses its own application scope and limitation. The commonly used turbulence models which were considered for initial comparison with the relevant experimental results were the Realizable k-ε model (Elebiary and Taslim 2011), v 2 -f model (Bhagwat and Sridharan 2016), SST k-ω model (Yang et al 2014), and Transition SST model (Zhang et al 2013). The verification model used was a single impingement jet with detailed experimental data of heat transfer characteristics.…”

Section: Turbulence Modeling Validationmentioning

confidence: 99%

Numerical Simulation of Flow and Heat Transfer Characteristics of a Liquid Jet Impinging on a Cylindrical Cavity Heat Sink

2021

JAFM

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In this study, the flow and heat transfer characteristics of a liquid jet impinging on cylindrical cavity heat sinks with a local body heat source were numerically investigated. The Transition SST turbulence model was validated and adopted. The parameters of structure and flow, including d/D = 2, 3, and 4, h/D = 0.05, 0.10, 0.15, and 0.20, and Re = 5,000, 10,000, and 23,000, were investigated. The results revealed that the adoption of a cylindrical cavity structure can improve the heat transfer capacity of the heat sink. A horseshoe vortex introduced by an inclined jet near the cavity edge region improved the heat transfer performance. The maximum enhancement of the cylindrical cavity heat sink was 11.8% compared with the flat plate heat sink when d/D = 3, h/D = 0.15, and Re = 23,000.

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“…And the research of Li et al [30] also illustrated the k-x SST turbulence model provides the best match to experimental flow and heat transfer results. Yang et al [31] compared the results of experiment and simulation both with steady and unsteady k-x SST model. It was found that the numerical results with the unsteady k-x SST model were in a good agreement with experiment.…”

Section: Selection Of Turbulence Modelmentioning

confidence: 99%

“…It was found that the numerical results with the unsteady k-x SST model were in a good agreement with experiment. In order to verify the simulation accuracy, the experiment performed by Yang et al [31] at Re ¼ 15,000 is selected for comparison in the present study. Numerical computations were conducted with steady and unsteady k-x SST models by utilizing the commercial solver ANSYS CFX [32].…”

Section: Selection Of Turbulence Modelmentioning

confidence: 99%

Conjugated heat transfer investigation with racetrack-shaped jet hole and double swirling chamber in rotating jet impingement

Wang

Liu

Wang

et al. 2018

Numerical Heat Transfer, Part A: Applications

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A numerical study is performed to investigate the effects of jet hole shape and channel geometry on impingement cooling for both stationary and rotating condition. Two hole shapes and two channel geometries are introduced to counteract the adverse effects of centrifugal force and Coriolis force which are induced by rotation. Both the fluid and solid part are considered for realizing the conjugate heat transfer simulation. The unsteady k-x SST turbulence model was employed to obtain the time-averaged Nusselt number distributions, time-averaged temperature and temperature gradient fields and the turbulent flow structure. The results show that the cooling jet from the racetrack-shaped hole can effectively withstand the intensive streamwise crossflow to enhance the heat transfer. The double swirling chamber (DSC) channel significantly improves the heat transfer characteristics on the cambered surface and diminishes the adverse effects of the Coriolis force. The high Nu number region is expanded while the temperature uniformity is improved. The combination of the racetrackshaped hole and DSC channel provides the highest heat transfer among the four cases. The averaged Nu numbers on both the leading and trailing sides for all tested cases show obvious downtrend as rotation number increases, especially at high Reynolds number. ARTICLE HISTORY

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Experimental and numerical investigation of unsteady impingement cooling within a blade leading edge passage

Cited by 74 publications

References 18 publications

Propulsion Research and Academic Programs at the University of Alabama in Huntsville - 2018

Propulsion Research and Academic Programs at the University of Alabama in Huntsville - 2018

Numerical Simulation of Flow and Heat Transfer Characteristics of a Liquid Jet Impinging on a Cylindrical Cavity Heat Sink

Conjugated heat transfer investigation with racetrack-shaped jet hole and double swirling chamber in rotating jet impingement

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