SU1357613A1 - Diffuser - Google Patents

Abstract

Invention m, b. used in devices having a sudden flow expansion. The purpose of the invention is to reduce the total pressure loss in the diffuser. For this, at the exit of the transition section 3, a permeable partition 4 is installed, and the forming 5 transition section 3 is outlined by a hyperbole. The partition 4 slows down the flow and causes its expansion in the direction from the channel axis, directed the medium towards the generator 5. Simultaneous impact on the flow of the profiled wall of section 3 and partition 4 leads to the disappearance of reverse currents, which reduces the loss of total pressure. sd |

Description

The invention relates to fluid dynamics and can be used in devices having a sudden expansion of flow

The purpose of the invention is to reduce the total pressure loss in the diffuser,

The drawing shows a schematic of a diffuser.

The diffuser contains sections 1 and 2, respectively, of smaller and larger diameters and a transition section 3 located between them, made in the form of a body of rotation. The diffuser is provided with an installed exit of the transition section 3 with permeable partition 4 with a resistance coefficient determined from

R.4

.)

where R and R. are, respectively, the radii of the Bkhodniy and output sections of the transition section 3, and the resulting 5 transition sections 3 are outlined by a hyperbola with

IlotoK under the influence of the disturbing force, for example, the pressure difference moves from section 1 of smaller diameter towards section 2 of larger diameter. Installed at the exit of the transition section 3 permeable partition 4 inhibits the flow and you M Editor, Blanar Order 5979/32

Compiled WdChernov Tehred M.Hodanich

Corrector A

Circulation 571 Subscription

VNIIPI USSR State Committee

for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab ,, Dv4 / 5

“Production and printing company, Uzhgorod, Projecto st., 4

its expansion in the direction from the channel axis, as if it directed the medium to the generatrix 5 of the transition section 3. .

Formula of the invention

 ABOUT

. A diffuser containing areas of smaller and larger diameters and a transition area distributed between them; made in the form of a body of rotation, characterized in that, in order to reduce losses, the diffuser 20 is provided with a permeable partition installed at the exit of the transition section with a resistance coefficient determined from the ratio

Where

f..0., (| i)

R, and

RJ, - respectively radii

input and output sections of the transition section,

and forming a transitional region

outlined by hyperbole

Proofreader AoOruchuar

Claims (1)

Formula of the invention. A diffuser containing sections of smaller and larger diameters and a transition section located between them; made in the form of a body of revolution, characterized in that, in order to reduce losses, the diffuser 20 is equipped with a permeable partition installed at the output of the transition section with a resistance coefficient determined from the ratio of ²⁵ f. ! (&) *, where R, and R are the radii of the input and output sections of the transition section, respectively, and the generatrix of the transition section is outlined by hyperbola ₀