Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis
In order to investigate the effect of various impeller tip clearances on the pressure pulsation in a mixed-flow pump, the energy performance test and pressure pulsation experiment of a mixed-flow pump with different tip clearances are studied simultaneously. The pressure pulsation signals at impelle...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/9041686 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849414917991432192 |
|---|---|
| author | Leilei Ji Wei Li Weidong Shi Ling Zhou Ramesh Agarwal |
| author_facet | Leilei Ji Wei Li Weidong Shi Ling Zhou Ramesh Agarwal |
| author_sort | Leilei Ji |
| collection | DOAJ |
| description | In order to investigate the effect of various impeller tip clearances on the pressure pulsation in a mixed-flow pump, the energy performance test and pressure pulsation experiment of a mixed-flow pump with different tip clearances are studied simultaneously. The pressure pulsation signals at impeller inlet, middle, and oulet are processed and analyzed by the wavelet transform. The results show that the change of tip clearance can affect the head and efficiency of mixed-flow pump. Under designed flow rate, when the tip clearance increases from 0.2 mm to 1.1 mm, the head and efficiency decrease by 18.1% and 11.6%, respectively. Due to the strong influence of blade passing frequency (BPF) at impeller middle, the period of pressure pulsation curve is about 1/4 of impeller rotation period. At impeller inlet, the low-frequency pulsation with energy concentration is the main disturbance frequency, and, with the increase of tip clearance, not only does the high-value region of wavelet spectrum expand to low-frequency direction but also it is easy to form second-order peaks in the time-averaged wavelet curve. At impeller outlet, affected by BPF and rotor-stator interaction (RSI), the high-frequency disturbance in RSI area decreases first and then increases. The wavelet coherence demonstrates the stable low-frequency disturbances in comparison to others and it will affect the flow field at impeller middle. |
| format | Article |
| id | doaj-art-6a28591e18ec4365a19d63cfbf32eeeb |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-6a28591e18ec4365a19d63cfbf32eeeb2025-08-20T03:33:41ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/90416869041686Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet AnalysisLeilei Ji0Wei Li1Weidong Shi2Ling Zhou3Ramesh Agarwal4Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaCollege of Mechanical Engineering, Nantong University, Nantong 226019, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaDepartment of Mechanical Engineering & Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USAIn order to investigate the effect of various impeller tip clearances on the pressure pulsation in a mixed-flow pump, the energy performance test and pressure pulsation experiment of a mixed-flow pump with different tip clearances are studied simultaneously. The pressure pulsation signals at impeller inlet, middle, and oulet are processed and analyzed by the wavelet transform. The results show that the change of tip clearance can affect the head and efficiency of mixed-flow pump. Under designed flow rate, when the tip clearance increases from 0.2 mm to 1.1 mm, the head and efficiency decrease by 18.1% and 11.6%, respectively. Due to the strong influence of blade passing frequency (BPF) at impeller middle, the period of pressure pulsation curve is about 1/4 of impeller rotation period. At impeller inlet, the low-frequency pulsation with energy concentration is the main disturbance frequency, and, with the increase of tip clearance, not only does the high-value region of wavelet spectrum expand to low-frequency direction but also it is easy to form second-order peaks in the time-averaged wavelet curve. At impeller outlet, affected by BPF and rotor-stator interaction (RSI), the high-frequency disturbance in RSI area decreases first and then increases. The wavelet coherence demonstrates the stable low-frequency disturbances in comparison to others and it will affect the flow field at impeller middle.http://dx.doi.org/10.1155/2020/9041686 |
| spellingShingle | Leilei Ji Wei Li Weidong Shi Ling Zhou Ramesh Agarwal Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis Shock and Vibration |
| title | Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis |
| title_full | Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis |
| title_fullStr | Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis |
| title_full_unstemmed | Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis |
| title_short | Experimental Study of Pressure Pulsation in a Mixed-Flow Pump with Different Tip Clearances Based on Wavelet Analysis |
| title_sort | experimental study of pressure pulsation in a mixed flow pump with different tip clearances based on wavelet analysis |
| url | http://dx.doi.org/10.1155/2020/9041686 |
| work_keys_str_mv | AT leileiji experimentalstudyofpressurepulsationinamixedflowpumpwithdifferenttipclearancesbasedonwaveletanalysis AT weili experimentalstudyofpressurepulsationinamixedflowpumpwithdifferenttipclearancesbasedonwaveletanalysis AT weidongshi experimentalstudyofpressurepulsationinamixedflowpumpwithdifferenttipclearancesbasedonwaveletanalysis AT lingzhou experimentalstudyofpressurepulsationinamixedflowpumpwithdifferenttipclearancesbasedonwaveletanalysis AT rameshagarwal experimentalstudyofpressurepulsationinamixedflowpumpwithdifferenttipclearancesbasedonwaveletanalysis |