Analysis of novel low specific speed pump designs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F14%3APU111835" target="_blank" >RIV/00216305:26210/14:PU111835 - isvavai.cz</a>

Result on the web

<a href="http://iopscience.iop.org/1755-1315/22/1/012010/pdf/1755-1315_22_1_012010.pdf" target="_blank" >http://iopscience.iop.org/1755-1315/22/1/012010/pdf/1755-1315_22_1_012010.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1755-1315/22/1/012010" target="_blank" >10.1088/1755-1315/22/1/012010</a>

Result language

angličtina

Original language name

Analysis of novel low specific speed pump designs

Original language description

Centrifugal pumps with very low specific speed present significant design challenges. Narrow blade channels, large surface area of hub and shroud discs relative to the blade area, and the presence of significant of blade channel vortices are typical features linked with the difficulty to achieve head and efficiency requirements for such designs. This paper presents an investigation of two novel designs of very low specific speed impellers: impeller having blades with very thick trailing edges and impeller with thick trailing edges and recirculating channels, which are bored along the impeller circumference. Numerical simulations and experimental measurements were used to study the flow dynamics of those new designs. It was shown that thick trailing edges suppress local eddies in the blade channels and decrease energy dissipation due to excessive swirling. Furthermore the recirculating channels will increase the circumferential velocity component on impeller outlet thus increasing the specific energy, albeit adversely affecting the hydraulic efficiency. Analysis of the energy dissipation in the volute showed that the number of the recirculating channels, their geometry and location, all have significant impact on the magnitude of dissipated energy and its distribution which in turn influences the shape of the head curve and the stability of the pump operation. Energy dissipation within whole pump interior (blade channels, volute, rotor-stator gaps) was also studied.

Czech name

—

Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

<a href="/en/project/EE2.3.30.0005" target="_blank" >EE2.3.30.0005: Support of Interdisciplinary Excellence Research Teams Establishment at BUT</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Earth and Environmental Science

ISBN

—

ISSN

1755-1315

e-ISSN

—

Number of pages

11

Pages from-to

1-11

Publisher name

IOP Science

Place of publication

Spojené království Velké Británie a Severního Ir

Event location

Montreal

Event date

Sep 22, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000347441900010