EXPERIMENTAL INVESTIGATION OF FILM COOLING EFFECTIVENESS APPLYING A NOVEL INTEGRATED COMPOUND JETS DESIGN FOR THE JET HOLES

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Ramezanizadeh Mahdi; POULADRANG YOUNESS

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Journal: Modares Mechanical Engineering Year:2018 | Volume:18 | Issue:3 Page(s): 302-310

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Title

EXPERIMENTAL INVESTIGATION OF FILM COOLING EFFECTIVENESS APPLYING A NOVEL INTEGRATED COMPOUND JETS DESIGN FOR THE JET HOLES

Author(s)

Ramezanizadeh Mahdi | POULADRANG YOUNESS | Issue Writer Certificate

Keywords

FILM COOLING EFFECTIVENESSQ2

NOVEL JET HOLE GEOMETRYQ1

COMPOUND INTEGRATED JETSQ1

EXPERIMENTAL TESTQ1

INFRARED THERMOGRAPHYQ1

Abstract

Several factors such as shape of the jet hole, blowing ratio, density ratio, mainstream turbulence intensity, and …, affect the FILM COOLING EFFECTIVENESS. Among the above mentioned factors, the FILM COOLING EFFECTIVENESS is strongly influenced by the shape of the jet hole. This geometry should be designed in such a way to minimize the jet's vertical momentum and produce more surface coverage. In this research, cooling performance of a novel integrated compound (earring) jets design is investigated experimentally, using an INFRARED THERMOGRAPHY method. Steady state heat transfer experiments at the jet Reynolds number of 10, 000 (based on the jet diameter) are performed over the test plate. The jets injection angle into the mainflow are considered to be 30 degrees relative to the surface. The measurements are carried out at the mainstream speed of 27 m/s and at four different blowing ratios of 0.4, 0.5, 0.7, and 0.8. The obtained results show that at constant jets cross section, the earing jets geometry leads to higher FILM COOLING EFFECTIVENESS, compared to the cylindrical hole geometry.Optimum blowing ratio is 0.8 and the lowest effectiveness is obtained on the surface at the blowing ratio of 0.4. The flow structures which are introduced by this novel geometry, reduces the flow mixing between the mainstream and the cooling jets. Therefore, enhances the FILM COOLING EFFECTIVENESS and the coolant fluid more uniformly distributes over the surface laterally.

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APA: Copy

Ramezanizadeh, Mahdi, & POULADRANG, YOUNESS. (2018). EXPERIMENTAL INVESTIGATION OF FILM COOLING EFFECTIVENESS APPLYING A NOVEL INTEGRATED COMPOUND JETS DESIGN FOR THE JET HOLES. MODARES MECHANICAL ENGINEERING, 18(3 ), 302-310. SID. https://sid.ir/paper/178978/en

Vancouver: Copy

Ramezanizadeh Mahdi, POULADRANG YOUNESS. EXPERIMENTAL INVESTIGATION OF FILM COOLING EFFECTIVENESS APPLYING A NOVEL INTEGRATED COMPOUND JETS DESIGN FOR THE JET HOLES. MODARES MECHANICAL ENGINEERING[Internet]. 2018;18(3 ):302-310. Available from: https://sid.ir/paper/178978/en

IEEE: Copy

Mahdi Ramezanizadeh, and YOUNESS POULADRANG, “EXPERIMENTAL INVESTIGATION OF FILM COOLING EFFECTIVENESS APPLYING A NOVEL INTEGRATED COMPOUND JETS DESIGN FOR THE JET HOLES,” MODARES MECHANICAL ENGINEERING, vol. 18, no. 3 , pp. 302–310, 2018, [Online]. Available: https://sid.ir/paper/178978/en

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