Article,
Druckabfall bei der Strömung von Gas/Dampf-Flüssigkeits-Gemischen in Rohren
Chemie Ingenieur Technik, 50 (3): 167--180 (1978)
DOI: 10.1002/cite.330500304
Abstract
Pressure drop during gas/vapour-liquid flow in pipes. Pressure drop in two phase flow is considered to be made up of terms for geodetical elevation or depression, acceleration, and friction. The geodetical and momentum pressure drop are discussed and reasonable correlations are presented, along with their limitations and range of application. Various relationships are available for calculating the technically important friction component. However, such predictions are still relatively inexact. If purely empirical correlations are neglected, all the remaining predictive schemes can be related to three basic physical models. These models as well as the commonly accepted and most reliable relationships are discussed and classified according to type. Furthermore, their scope is defined and the accuracy of prediction systematically compared with the aid of a newly set-up data bank. The extensive literature data consulted refer to single component two phase flow of water and various refrigerants and several two-component systems in horizontal and vertical unheated straight pipes under industrially relevant flow conditions. Finally, the accuracy of the prediction of some generally accepted void correlations is dealt with; here too, numerous published void fraction data have been gathered and checked.
