The Analysis of Flow Separation Loss of Impeller in Centrifugal Compressor under Variable Conditions

DOI

10.2991/icmmct-16.2016.130How to use a DOI?

Keywords

Angle of attack, Degree of separation loss, Equivalent volume, Numerical simulation

Abstract

In order to study the change condition of the influence on the centrifugal compressor blade field, we change the size of the centrifugal compressor inlet flow and the centrifugal compressor impeller rotational speed,using the realizable κ-ε ii equation model to do the steady numerical simulation for the full port of centrifugal compressor. Through calculation, we get different inlet flow and rotate speed of centrifugal compressor internal flow field distribution of relative velocity,at the same time using the concept of Degree of Separation Loss to analyze the separation loss within impeller passage. The results show that under the condition of variable working condition, the change of Angle of attack is the primary factor for the the impeller separation, and when the Angle of attack of the same time, the smaller the relative velocity, the greater the separation loss. Therefore in the process of actual production, in order to reduce the loss of separation, we should reduce the size of Angle of attack, appropriatly increase import flow or impeller rotational speed.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Bin Cai
AU  - Yongsheng Su
PY  - 2016/03
DA  - 2016/03
TI  - The Analysis of Flow Separation Loss of Impeller in Centrifugal Compressor under Variable Conditions
BT  - Proceedings of the 2016 4th International Conference on Machinery, Materials and Computing Technology
PB  - Atlantis Press
SP  - 667
EP  - 672
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmct-16.2016.130
DO  - 10.2991/icmmct-16.2016.130
ID  - Cai2016/03
ER  -