Laminar Throughflow of Varying-Quality Steam Between Corotating Disks

[+] Author and Article Information
C. R. Truman, W. Rice, D. F. Jankowski

Arizona State University, Tempe, Ariz.

J. Fluids Eng 100(2), 194-200 (Jun 01, 1978) (7 pages) doi:10.1115/1.3448629 History: Received July 01, 1976; Online October 12, 2010


A local analysis was made of the laminar throughflow between corotating disks of a Newtonian vapor containing liquid droplets. Such a flow is of practical interest in multiple-disk turbomachinery, and specifically is a model of a two-phase, single component flow (saturated vapor - saturated liquid steam) which would arise in geothermal applications of a multiple-disk turbine. Local mass conservation and momentum equations for the vapor and droplet fields were used, as well as mass conservation and energy equations for a single droplet. The vapor-droplet interaction was modeled by a drag force based on the well-known drag coefficients for flow past spheres. The governing equations were reduced to parabolic form by order-of-magnitude arguments to allow a marching-type solution. The nonlinear partial differential equations were replaced by nonlinear finite-difference equations, which were linearized. The resulting system of linear algebraic equations was solved directly. Various results are presented, including results for a set of flow parameters which are close to those applicable for multiple-disk turbines operating on geothermal steam.

Copyright © 1978 by ASME
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