ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The adiabatic, evaporating, two-phase flow of steam and water in horizontal pipe including the critical flow was successfully described by a system of nonlinear differential equations which include different phase velocities, fluid acceleration, wall shear forces, interface shear forces, and mass and energy transfer between the phases. The solution of the differential equations by the method of Runge-Kutta was facilitated with a high-speed digital computer. Experimental data were obtained which included void fraction measurement by X-ray attenuation and showed that the theoretical equations described the complex flow phenomena to ± 10% when radial temperature gradients were small. Design charts based on the numerical solution of the theoretical equations are presented for rapid evaluation of the flow variables for the system steam-water including critical flow for inlet pressures from 30 to 150 lb./sq.in.abs., mass flow rates per unit area from 300 to 1,000 lb./sq. ft. sec., and L/D ratios from 25 to 1,000. The critical flow is defined as the maximum flow rate for a given pressure at the point of initial vaporization and L/D ratio.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690100215
