Results 171 to 180 of about 37,943 (215)
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The reciprocating motion characteristics of nanofluid inside the piston cooling gallery
Powder Technology, 2015Abstract With the peak cylinder pressure in diesel engines steadily increasing, simply extending or modifying the cooling gallery configuration may be insufficient when power rating is above a certain level. The nanofluid with better heat transfer capacity may become a more appropriate option to improve piston cooling performance.
Peng Wang +4 more
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Controllable thermal state design method of flexible shapes of piston cooling galleries
Applied Thermal Engineering, 2021Abstract The uneven temperature field is a great contributor to abnormal deformations and local damages of the piston. The piston gallery cooling is one of the effective ways to achieve an acceptable temperature field of the piston head. However, the traditional design of piston cooling gallery cannot accurately control the local thermal state of the
Xiwen Deng +4 more
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Multi-objective optimization of cooling galleries inside pistons of a diesel engine
Applied Thermal Engineering, 2018Abstract In order to solve a trade-off problem between temperature and thermal stress of pistons for cross section design of a cooling gallery, a multi-objective optimization and a co-simulation workflow are carried out to calculate an optimal design and thermal solutions inside the piston’s thermal system of a diesel engine.
Xiwen Deng +4 more
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The flow and heat transfer characteristics of engine oil inside the piston cooling gallery
Applied Thermal Engineering, 2017Abstract The current study employed the Eulerian multiphase model and the geometry reconstruction scheme to describe the periodic flow and heat transfer processes of engine oil inside the piston cooling gallery. The effects of engine speed and oil jet velocity on the heat transfer were explored.
Peng Wang +5 more
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International Communications in Heat and Mass Transfer, 2020
Abstract In research of the accurate relation between two-phase flow pattern and heat transfer characteristics in distinct cooling gallery structures, a dynamic transient visualization test bench was established recording flow of fluid real-time. Meanwhile, multiphase flow model and dynamic mesh were also employed to carry out simulation calculation ...
Deng Lijun, Zhang Jian, Hao Guannan
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Abstract In research of the accurate relation between two-phase flow pattern and heat transfer characteristics in distinct cooling gallery structures, a dynamic transient visualization test bench was established recording flow of fluid real-time. Meanwhile, multiphase flow model and dynamic mesh were also employed to carry out simulation calculation ...
Deng Lijun, Zhang Jian, Hao Guannan
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The gas-liquid two-phase flow in reciprocating enclosure with piston cooling gallery application
International Journal of Thermal Sciences, 2018Abstract With the specific power of diesel engines steadily advancing, heat removal from the piston has become a determining factor to ensure engine reliability and durability of engines. However, piston head complex structure makes it very difficult to accurately capture the flow and heat transfer processes of cooling engine oil within the piston ...
Peng Wang +4 more
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CFD Simulation of Oil Jet Piston Cooling Applied to Pistons with Cooling Gallery
SAE International Journal of Advances and Current Practices in Mobility, 2022<div class="section abstract"><div class="htmlview paragraph">Efficient cooling of pistons with oil jets can avoid engine failures due to exceeded piston temperatures of thermally high-loaded combustion engines and can contribute to fuel consumption savings.
Anselm Hopf +3 more
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Multicriteria optimization of the diesel engine piston cooling gallery
2020 Ivannikov Ispras Open Conference (ISPRAS), 2020This paper tested the approach to analyzing the conflicting factors acting on the internal combustion engine piston based on multicriteria optimization. The approach was implemented based on a number of open-source program tools linked by the command line scripts developed by the authors.
Vladimir Zenkin +2 more
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Whispering gallery mode HgCdTe laser operating near 4 μm under Peltier cooling
Applied Physics Letters, 2023Due to their widely tunable bandgap, HgCdTe heterostructures with quantum wells are a promising material system for semiconductor lasers in the entire mid-infrared range. Recently, Auger-suppressed structures allowed interband stimulated emission (SE) in the atmospheric transparency window 3–5 μm well above 200 K, while previously it was limited to ...
A. A. Razova +12 more
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Advanced Piston Cooling Efficiency: A Comparison of Different New Gallery Cooling Concepts
SAE Technical Paper Series, 2007<div class="htmlview paragraph">This paper shows results of an experimental study based on a passenger car diesel engine: The piston temperature reduction potential of advanced gallery cooling concepts compared to the standard gallery cooling solution has been investigated.
Norman Thiel +3 more
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