Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed
The rotational speed of pumps often encounters fluctuation in engineering for some reasons. In this paper, in order to study the transient response characteristic of a prototype centrifugal pump subjected to fluctuating rotational speed, a closed-loop pipe system including the pump is built to accom...
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2014-01-01
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Series: | Mathematical Problems in Engineering |
Online Access: | http://dx.doi.org/10.1155/2014/436473 |
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doaj-00809344d1964347929009dc65a6f3982020-11-25T01:03:26ZengHindawi LimitedMathematical Problems in Engineering1024-123X1563-51472014-01-01201410.1155/2014/436473436473Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational SpeedYu-Liang Zhang0Jun-Jian Xiao1Yan-Jun Zhao2Ying-Yu Ji3College of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaCollege of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaQuzhou College of Technology, Quzhou 324000, ChinaCollege of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaThe rotational speed of pumps often encounters fluctuation in engineering for some reasons. In this paper, in order to study the transient response characteristic of a prototype centrifugal pump subjected to fluctuating rotational speed, a closed-loop pipe system including the pump is built to accomplish unsteady flow calculations in which the boundary conditions at the inlet and the outlet of the pump are not required to be set. The external performance results show that the head’s responsiveness to the fluctuating rotational speed is very good, while the flow rate’s responsiveness is slightly delayed. The variation tendencies of the static pressures at the inlet and the outlet of the pump are almost completely opposite, wherein the variation tendency of the static pressure at the outlet is identical with that of the rotational speed. The intensity of the turbulence energy in each impeller channel is relatively uniform in the transient flow calculations, while, in the quasi-steady flow calculation, it becomes weaker in a channel closed to the volute tongue. The nondimensional flow rate and head coefficients are dependent on the rotational speed, and their variation tendencies are opposite to that of the fluctuating rotational speed as a whole.http://dx.doi.org/10.1155/2014/436473 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yu-Liang Zhang Jun-Jian Xiao Yan-Jun Zhao Ying-Yu Ji |
spellingShingle |
Yu-Liang Zhang Jun-Jian Xiao Yan-Jun Zhao Ying-Yu Ji Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed Mathematical Problems in Engineering |
author_facet |
Yu-Liang Zhang Jun-Jian Xiao Yan-Jun Zhao Ying-Yu Ji |
author_sort |
Yu-Liang Zhang |
title |
Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed |
title_short |
Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed |
title_full |
Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed |
title_fullStr |
Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed |
title_full_unstemmed |
Numerical Investigation on a Prototype Centrifugal Pump Subjected to Fluctuating Rotational Speed |
title_sort |
numerical investigation on a prototype centrifugal pump subjected to fluctuating rotational speed |
publisher |
Hindawi Limited |
series |
Mathematical Problems in Engineering |
issn |
1024-123X 1563-5147 |
publishDate |
2014-01-01 |
description |
The rotational speed of pumps often encounters fluctuation in engineering for some reasons. In this paper, in order to study the transient response characteristic of a prototype centrifugal pump subjected to fluctuating rotational speed, a closed-loop pipe system including the pump is built to accomplish unsteady flow calculations in which the boundary conditions at the inlet and the outlet of the pump are not required to be set. The external performance results show that the head’s responsiveness to the fluctuating rotational speed is very good, while the flow rate’s responsiveness is slightly delayed. The variation tendencies of the static pressures at the inlet and the outlet of the pump are almost completely opposite, wherein the variation tendency of the static pressure at the outlet is identical with that of the rotational speed. The intensity of the turbulence energy in each impeller channel is relatively uniform in the transient flow calculations, while, in the quasi-steady flow calculation, it becomes weaker in a channel closed to the volute tongue. The nondimensional flow rate and head coefficients are dependent on the rotational speed, and their variation tendencies are opposite to that of the fluctuating rotational speed as a whole. |
url |
http://dx.doi.org/10.1155/2014/436473 |
work_keys_str_mv |
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