SU1695003A1

SU1695003A1 - Flat diffuser

Info

Publication number: SU1695003A1
Application number: SU894744760A
Authority: SU
Inventors: Лев Константинович Чернявский
Original assignee: Ленинградский Политехнический Институт Им.М.И.Калинина
Priority date: 1989-10-03
Filing date: 1989-10-03
Publication date: 1991-11-30

Abstract

Изобретение относитс к прикладной гидроаэродинамике, в частности к гидравлике трубопроводных систем, и может быть использовано при проектировании плоских диффузорных участков. Целью изобретени вл етс уменьшение потерь давлени . Указанна цель достигаетс тем, что в диффузоре , две стенки которого выполнены плоскими и установлены параллельно друг другу, а две другие - 3 и 4 выполнены расход щимис , закон, определ ющий рассто ние а между расход щимис поверхност ми по длине диффузора, выбран в зависимости: а авх + (авых-аВх) (X/L)(1+K)/(1 K). где авх и авых - рассто ни , отнесенные, соответственно, к сечени м 5 и 6; Х-продольна координата; L-длина диффузора: К - коэффициент, выбираемый в пределах 0,01-0,43 при оптимальном значении 0,15. 1 з.п.ф-лы, 2 ил.The invention relates to applied fluid dynamics, in particular to the hydraulics of pipeline systems, and can be used in the design of flat diffuser sections. The aim of the invention is to reduce pressure loss. This goal is achieved by the fact that in a diffuser, the two walls of which are flat and set parallel to each other, and the other two, 3 and 4, are divergent, the law determining the distance a between divergent surfaces along the diffuser length is chosen depending on : a avx + (avyh-abBh) (X / L) (1 + K) / (1 K). where avx and avyh are the distances referred, respectively, to sections 5 and 6; X-longitudinal coordinate; L-length of the diffuser: K - coefficient chosen in the range of 0.01-0.43 with the optimal value of 0.15. 1 hp ff, 2 ill.

Description

Фиг. 2FIG. 2

Claims

Claim

1. A flat diffuser containing four internal surfaces, two of which are flat and parallel to one another, and the other two are perpendicular to the first two and diverge in the direction from the input section of the diffuser to the output, and the distance between diverging surfaces increases along the diffuser according to the law aimed at minimizing pressure loss, characterized in that, in order to reduce pressure loss, the said hole is selected in the form of a = a _B x + (anb! xa _ii xXX / Ly ^{1 + l <} ' ^{1 ' ^{l <)} .

where a is the distance between diverging surfaces:

Evh and Evyh are the distances between diverging surfaces, respectively, in the inlet and outlet sections of the diffuser;

X is the longitudinal coordinate measured along the midline of the diffuser in the direction from the input section to the output;

L is the length of the diffuser in the midline; K is a coefficient equal to 0.01-0.43.

2, The diffuser according to claim 1, on the basis of the fact that the coefficient K is chosen equal to 0.15.

Figure 2