• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire de Mécanique des Fluides de Lille (LMFL)
  • View Item
  • Home
  • Laboratoire de Mécanique des Fluides de Lille (LMFL)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Transient behavior of a radial vaneless diffuser

Communication avec acte
Author
DUPONT, Patrick
CAIGNAERT, Guy
BOIS, Gérard
ccDAZIN, Antoine
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]

URI
http://hdl.handle.net/10985/6894
Date
2011

Abstract

The paper refers to the behavior of a radial flow pump vaneless diffuser during a starting period. Results obtained with a 1D numerical model are compared with some new experimental data which have been obtained using 2D/3C High repetition rate PIV within the diffuser coupled with unsteady pressure measurements. These tests have been performed on a test rig with a radial impeller matched with a vaneless diffuser. They have been made in air, on a test rig well adapted for studies on interactions between impeller and diffuser, as well as for the use of optical methods and especially Particle Image Velocimetry (PIV) as there is no volute downstream of the diffuser. The present study refers to new experiments combining pressure measurements and 2D/3C High Speed PIV at partial flow rates within a vaneless diffuser with a large outlet radius. Four Brüel & Kjaer condenser microphones are used for the unsteady pressure measurements. They were flush mounted on the shroud side of the diffuser wall and on the suction pipe of the pump. The sampling frequency was 2048 Hz. For PIV measurements, the laser sheet was generated by a Darwin PIV ND:YLF Laser at three heights within the diffuser. PIV snapshots have been recorded by two identical CMOS cameras. A home made software has been used for the images treatment. The results consist in fields of 80 x 120 mm2 and 81 x 125 velocity vectors with a temporal resolution of 250 velocity maps per second. For each flow rate and each laser sheet height in the diffuser, two acquisitions of about 1500 velocity maps have been realised. The experimental data are compared with the ones provided by a 1D transient model of the flow within the diffuser.

Files in this item

Name:
AJK2011- 06059f.pdf
Size:
1.237Mb
Format:
PDF
Description:
article complet
View/Open

Collections

  • Laboratoire de Mécanique des Fluides de Lille (LMFL)

Related items

Showing items related by title, author, creator and subject.

  • High-speed stereoscopic PIV study of rotating instabilities in a radial vaneless diffuser 
    Article dans une revue avec comité de lecture
    CAVAZZINI, Giovanna; PAVESI, Giorgio; DUPONT, Patrick; COUDERT, Sebastien; ARDIZZON, Giorgio; CAIGNAERT, Guy; BOIS, Gérard; ccDAZIN, Antoine (Springer Verlag (Germany), 2011)
    This paper presents an experimental analysis of the unsteady phenomena developing in a vaneless diffuser of a radial flow pump. Partial flow operating conditions were investigated using 2D/3C high repetition rate PIV, ...
  • Experimental validation of an ultrasonic flowmeter for unsteady flows 
    Article dans une revue avec comité de lecture
    LEONTIDIS, Vlasios; CUVIER, Christophe; CAIGNAERT, Guy; DUPONT, Patrick; ROUSSETTE, Olivier; FAMMERY, Simon; NIVET, P.; ccDAZIN, Antoine (IOP Publishing, 2018)
    An ultrasonic flowmeter was developed for further applications in cryogenic conditions and for measuring flow rate fluctuations in the range of 0 to 70 Hz. The prototype was installed in a flow test rig, and was validated ...
  • Experimental and Numerical Investigation of Unforced unsteadiness in a Vaneless Radial Diffuser 
    Communication avec acte
    PAVESI, Giorgio; CAVAZZINI, Giovanna; CAIGNAERT, Guy; BOIS, Gérard; ARDIZZON, Guido; ccDAZIN, Antoine (EUROTURBO, 2011)
    The paper reports combined experimental and numerical investigations of unforced un- steadiness in a vaneless radial diffuser. Experimental data were obtained within the diffuser using stereoscopic time resolved Particle ...
  • Analysis of Cavitation Instabilities in a Four-Blade Inducer 
    Article dans une revue avec comité de lecture
    ccCOUTIER-DELGOSHA, Olivier; ccDAZIN, Antoine; CAIGNAERT, Guy; BOIS, Gérard (HPC - Hindawi Publishing Corporation, 2012)
    The cavitating behavior of a four-blade inducer tested in the LML laboratory large test facility is considered in the present paper. Experimental investigations based on unsteady pressure measurements and records from a ...
  • Data reduction problems using a 3 holes directional pressure probe to investigate mean flow characteristics in the vaneless gap between impeller and diffuser radial pump 
    Communication avec acte
    CHERDIEU, Patrick; DUPONT, Patrick; BOIS, Gérard; ccDAZIN, Antoine; ccBAYEUL-LAINÉ, Annie-Claude (6 th international conference on pimps and fans with compressors and wind turbines, 2013)
    Among several different measurement techniques that have been already performed and presented in a radial impeller pump model including PIV, a directional pressure probe has been used to obtain mean velocity field and ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales