Typical Characteristics of Radial-Flow Pumps Depending on Size of Clearance between Rotating Cascade of Vanes without Front Shroud and Casing [antikvár]

TYPICAL CHARACTERISTICS OF RADIAL-FLOW PUMPS DEPENDING ON SIZE OF CLEARANCE BETWEEN ROTATING CASCADE OF VANES WITHOUT FRONT SHROUD AND CASING A. VERBA and A. SZABO DEPARTMENT OF HYDRAULIC MACHINES, TECHNICAL UNIVERSITY, BUDAPEST [Manuscript received January 29, 1959] I. Introduction The operational features of pumps with semi-open impeller, i. e. without front-shroud, are considerably influenced by the size of the clearance be- tween blades of impeller and casing. In spite of this fact the literature scarcely deals with this question and does not give sufficient information. In research work on pumps at the Department of Hydraulic Machines of the Technical University, Budapest, the question concerning the radial-flow pumps has been investigated. In case of constant characterizing dimensions, i. e. constant impeller diameter D2, impeller breadth b and ratio D2/D1 the the effects of the said clearance were investigated, while the number of blades, the blade camber line and the blade thickness has been varied. So, our objective was to study the interrelations between each of the latter parameters and the clearance size.