Experimental analysis of turbocharger interaction with a pulsatile flow through time-resolved flow measurements upstream and downstream of the turbine
2012 (English)In: Institution of Mechanical Engineers - 10th International Conference on Turbochargers and Turbocharging, 2012, 405-415 p.Conference paper (Refereed)
The inflow to and outflow from turbochargers are highly complex and, in particular, pulsating. Nevertheless, most studies of turbocharger performance are conducted under steady conditions. Hence, there is a great interest in determining and understanding turbocharger performance maps under pulsatile conditions. The highly complex flow field constitutes a challenge for time-resolved flow measurements by means of conventional measurement techniques. In a recent paper by Laurantzon et al [Meas. Sci. Technol. 20 123001 (2010)], time-resolved bulk flow measurements under pulsatile conditions have been obtained via wavelet analysis of the signal from a vortex flow meter. Here, this method has been used in order to obtain time-resolved performance maps based on the mass flow both upstream and down-stream of the turbine. The results show that the turbine has a large damping effect on the mass flow pulsations, but that the pulse shape is to a high degree preserved while passing through the turbine, and that the time-dependent filling and emptying of the turbine case make the quasi-steady assumption invalid, if the whole turbine stage is considered.
Place, publisher, year, edition, pages
2012. 405-415 p.
Flow measurement, Flow of fluids, Mass transfer, Turbines, Wavelet analysis
IdentifiersURN: urn:nbn:se:kth:diva-94757ScopusID: 2-s2.0-84865469576ISBN: 978-085709209-0OAI: oai:DiVA.org:kth-94757DiVA: diva2:526041
10th International Conference on Turbochargers and Turbocharging; London; 15 May 2012 through 16 May 2012
QC 201210182012-05-102012-05-102013-04-16Bibliographically approved