Heat Transfer in Serpentine Flow Passages With Rotation

Mochizuki, Sadanari; Takamura, Junichi; Yamawaki, Shigemichi; Yang, Wen‐Jei

doi:10.1115/92-gt-190

Cited by 20 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And rotation effect was more conspicuous in radially outward flow passage than inward flow passage. After Wagner et al's meaningful work, Yang et al [7] (Ro 6 0.042) and Mochizuki et al [8] (Ro 6 0.232) studied heat transfer in rotating multi-pass smooth square channel by copper plate heating method. They concluded that the flow exhibited strong three dimensional structures in the 180-deg bends and a significant enhancement in heat transfer performance could be observed at all sharp turns.…”

Section: Effects Of Rotation Numbermentioning

confidence: 99%

Heat transfer investigation in rotating smooth square U-duct with different wall-temperature ratios and channel orientations

Deng

et al. 2015

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

Section: Effects Of Rotation Numbermentioning

confidence: 99%

Heat transfer investigation in rotating smooth square U-duct with different wall-temperature ratios and channel orientations

Deng

et al. 2015

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…Results indicated that the 180-deg turn had positive effect on heat transfer in the turn and downstream. Yang et al (1992) [5] and Mochizuki et al (1994) [6] studied heat transfer in rotating multi-pass smooth square channels vie copper plate heating technique. They concluded that the flow exhibited strong three dimensional structure in the 180-deg bends and a significant enhancement in heat transfer performance could be observed at all sharp turns.…”

Section: Effect Of Geometrical Factorsmentioning

confidence: 99%

“…And thus, flow in rotating channels becomes extraordinary complicated and three-dimensional. Luckily, many investigations on rotating U-ducts have been published by many previous works over the past two decades [4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

mentioning

confidence: 99%

Buoyancy effect on heat transfer in rotating smooth square U-duct at high rotation number

Yang

Deng

et al. 2014

Propulsion and Power Research

View full text Add to dashboard Cite

The buoyancy effect on heat transfer in a rotating, two-pass, square channel is experimentally investigated in current work. The classical copper plate technique is performed to measure the regional averaged heat transfer coefficients. In order to perform a fundamental research, all turbulators are removed away. Two approaches of altering Buoyancy numbers are selected: varying rotation number from 0 to 2.08 at Reynolds number ranges of 10000 to 70000, and varying inlet density ratio from 0.07 to 0.16 at Reynolds number of 10000. And thus, Buoyancy numbers range from 0 to 12.9 for both cases. According to the experimental results, the relationships between heat transfer and Buoyancy numbers are in accord with those obtained under different rotation numbers. For both leading and trailing surface, a critical Buoyancy number exists for each X/D location. Before the critical point, the effect of Buoyancy number on heat transfer is limited; but after that, the Nusselt number ratios show different increase rate. Given the same rotation number, higher wall temperature ratios with its corresponding higher Buoyancy numbers substantially enhance heat transfer on both passages. And the critical exceed-point that heat transfer from trailing surface higher than leading surface happens at the same Buoyancy number for different wall temperature ratios in the second passage. Thus, the stronger buoyancy effect promotes heat transfer enhancement at high rotation number condition.

show abstract

“…The pin-fin cooling channel The Jabob empirical formula and Grimision formula 28 are given as follows…”

Section: Cooling Channel With Ribsmentioning

confidence: 99%

Application of conjugate heat transfer and fluid network analysis to improvement design of turbine blade with integrated cooling structures

Yan

Cui

Shi

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

A combination of fluid network analysis method with conjugate heat transfer are applied to the improvement design of the integrated cooling structures in a high-performance turbine blade, coupled with the 3D viscous solver for the gas flow field. By comparison with the experimental results of open literatures, the methodology developed is numerically validated. For a high-pressure turbine rotor blade, it is used to rapidly predict and evaluate the aerodynamic and heat transfer performances of its integrated inner cooling structures. According to the computation results, three ways are definitely proposed for the improvement design, including the adjustment of the coolant flow mass entering into the front and rear cavities in a more appropriate flow mass ratio, the improvement of the turning geometries in serpentine channels to minimize the inner coolant flow resistance, and the adjustment of the local cooling structure dimension according to the high temperature region on outer surface of blade. Through the verification of the fully 3D conjugate heat transfer simulation for the fields of gas flow, solid blade and coolant flow, it shows that the maximum temperature on rotor blade surface is reduced obviously, the temperature distribution becomes more uniform after improvement, and the inlet parameters of cooling cavities are matched more reasonably. It is concluded that in this paper the fluid network combined with conjugate heat transfer significantly shortens the aerodynamic and heat transfer design cycle for the turbine blade with integrated cooling structures.

show abstract

Heat Transfer in Serpentine Flow Passages With Rotation

Cited by 20 publications

References 8 publications

Heat transfer investigation in rotating smooth square U-duct with different wall-temperature ratios and channel orientations

Heat transfer investigation in rotating smooth square U-duct with different wall-temperature ratios and channel orientations

Buoyancy effect on heat transfer in rotating smooth square U-duct at high rotation number

Application of conjugate heat transfer and fluid network analysis to improvement design of turbine blade with integrated cooling structures

Contact Info

Product

Resources

About