TY - JOUR

T1 - Loss and outlet flow angle estimation in rectangular scrolls for radial turbines by a constructed flow model

AU - Matsuo, Eito

AU - Inoue, Masahiro

AU - Yoshiki, Haruo

AU - Furukawa, Masato

PY - 1999

Y1 - 1999

N2 - The flow model and loss model in the rectangular scrolls constructed from the main flow with free vortex flow, the 3D equilibrium boundary layer on the side walls and the 2D boundary layer on the inner and outer walls, and the equation to estimate the loss in it were made in this research. The model is based on the theory of the 3D equilibrium boundary layer". The calculated results of it are shown good coincidence with test results2'3'. The flow equations are made from the 3D boundary layer equation with 1/n multiplier law and Mager's equation", and main flow with free vortex flow. Those equations have three unknown variables which are n, boundary layer thickness and radial velocity parameter. The mean outlet flow angles are estimated by using the values of those three variables decided by the measured volocity distributions2'3'. It is made clear that the flow rate of main flow is reduced by the flow through the 3D equilibrium boundary layer and the outlet flow angle become small at the main flow, and the loss less main flow is sustained for being main flow.

AB - The flow model and loss model in the rectangular scrolls constructed from the main flow with free vortex flow, the 3D equilibrium boundary layer on the side walls and the 2D boundary layer on the inner and outer walls, and the equation to estimate the loss in it were made in this research. The model is based on the theory of the 3D equilibrium boundary layer". The calculated results of it are shown good coincidence with test results2'3'. The flow equations are made from the 3D boundary layer equation with 1/n multiplier law and Mager's equation", and main flow with free vortex flow. Those equations have three unknown variables which are n, boundary layer thickness and radial velocity parameter. The mean outlet flow angles are estimated by using the values of those three variables decided by the measured volocity distributions2'3'. It is made clear that the flow rate of main flow is reduced by the flow through the 3D equilibrium boundary layer and the outlet flow angle become small at the main flow, and the loss less main flow is sustained for being main flow.

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U2 - 10.1299/kikaib.65.247

DO - 10.1299/kikaib.65.247

M3 - Article

AN - SCOPUS:77950035199

SN - 0387-5016

VL - 65

SP - 247

EP - 254

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

IS - 629

ER -