Annular Cascade Testing of Turbine Nozzles at High Exit Mach Numbers

1986 ◽  
Vol 108 (3) ◽  
pp. 313-320 ◽  
Author(s):  
R. G. Williamson ◽  
S. H. Moustapha
Keyword(s):  
Mach Number ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Pressure Losses ◽  
Dimensional Flow ◽  
Pressure Distributions ◽  
Exit Mach Number ◽  
Annular Cascade ◽  
End Wall

This paper presents detailed information on the three-dimensional flow field in a realistic low aspect ratio, high turning nozzle vane design which incorporates end-wall contouring and which has been tested over a range of exit Mach number from subsonic up to the design value at mean section of 1.15. The experimental results, in the form of nozzle surface pressure distributions as well as surveys of pressure losses and flow angles at exit, are compared with those calculated by a three-dimensional flow analysis. The effects of exit Mach number on the measured nozzle performance are also presented.

Flow Behavior Around Stayvanes and Guidevanes of a Francis Turbine

1996 ◽  
Vol 118 (1) ◽  
pp. 110-115 ◽  
Author(s):  
Toshiaki Suzuki ◽  
Tomotatsu Nagafuji ◽  
Hiroshi Komiya ◽  
Takako Shimada ◽  
Toshio Kobayashi ◽  
...  
Keyword(s):  
Viscous Flow ◽  
Flow Behavior ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Francis Turbine ◽  
Good Prediction ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Pressure Distributions

The three-dimensional computation of steady and incompressible internal flows is of interest in numerical simulations of turbomachinery, and such simulations are currently under investigation, from inviscid to viscous flow analyses. First, surface pressure distributions have been measured for the stayvanes and the guidevanes of a Francis turbine. They are presented to verify the numerical results. Second, both inviscid and viscous three-dimensional flow analyses have been made, so as to predict the flow behavior in the same domain. Comparison of the measured pressure distributions to the predicted pressure distributions has been made to study the usefulness of the present simulations. It can be pointed out that a global analysis which includes a runner flow passage, except runner blades, is necessary to predict the three-dimensional flow characteristics and that inviscid flow analysis has the capability of good prediction for flow without separation. Viscous flow analysis gives similar results, though it is necessary to investigate further the improvement of prediction accuracy. Flow characteristics around the stayvanes and the guidevanes are also discussed.

Optimization of the Three-Dimensional Flow Path in the Scroll-Nozzle System of a Radial Inflow Turbine

1984 ◽  
Vol 106 (2) ◽  
pp. 511-515 ◽  
Author(s):  
E. A. Baskharone
Keyword(s):  
Flow Analysis ◽  
Three Dimensional ◽  
Inviscid Flow ◽  
Three Dimensional Flow ◽  
Multiply Connected ◽  
Dimensional Flow ◽  
Nozzle Configuration ◽  
Flow Domain ◽  
Radial Inflow Turbine ◽  
Compressibility Effects

A three-dimensional inviscid flow analysis in the combined scroll-nozzle system of a radial inflow turbine is presented. The coupling of the two turbine components leads to a geometrically complicated, multiply-connected flow domain. Nevertheless, this coupling accounts for the mutual effects of both elements on the three-dimensional flow pattern throughout the entire system. Compressibility effects are treated for an accurate prediction of the nozzle performance. Different geometrical configurations of both the scroll passage and the nozzle region are investigated for optimum performance. The results corresponding to a sample scroll-nozzle configuration are verified by experimental measurements.

Three-dimensional flow in cavities

1963 ◽  
Vol 16 (4) ◽  
pp. 620-632 ◽  
Author(s):  
D. J. Maull ◽  
L. F. East
Keyword(s):  
Static Pressure ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Three Dimensional Flow ◽  
Large Span ◽  
Dimensional Flow ◽  
Pressure Distributions ◽  
Oil Flow ◽  
Two Dimensional Flow

The flow inside rectangular and other cavities in a wall has been investigated at low subsonic velocities using oil flow and surface static-pressure distributions. Evidence has been found of regular three-dimensional flows in cavities with large span-to-chord ratios which would normally be considered to have two-dimensional flow near their centre-lines. The dependence of the steadiness of the flow upon the cavity's span as well as its chord and depth has also been observed.

Three-Dimensional Flow Analysis in a Faraday-Type MHD Generator

2008 ◽  
Vol 44 (4) ◽  
pp. 1116-1123 ◽  
Author(s):  
Triwahju Hardianto ◽  
Nobuomi Sakamoto ◽  
Nobuhiro Harada
Keyword(s):  
Flow Analysis ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Mhd Generator ◽  
Dimensional Flow
Sign in / Sign up

Export Citation Format

Share Document