Acoustic One-Dimensional Compressor Model for Integration in a Gas-Dynamic Code Universitat Politècnica de València

Format:

Conference/Event

Author/Creator:

Torregrosa, Torregrosa, author.

Contributor:

Arnau, Francisco

Knutsson, Magnus

Lennblad, Johan

Piqueras, Pedro

Reyes-Belmonte, Miguel

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

An acoustic one-dimensional compressor model has been developed.This model is based on compressor map information and it is able topredict how the pressure waves are transmitted and reflected by thecompressor. This is later on necessary to predict radiated noise atthe intake orifice. The fluid-dynamic behavior of the compressorhas been reproduced by simplifying the real geometry inzero-dimensional and one-dimensional elements with acousticpurposes. These elements are responsible for attenuating orreflecting the pressure pulses generated by the engine. In order tocompensate the effect of these elements in the mean flow variables,the model uses a corrected compressor map. Despite of the fact thatthe compressor model was developed originally as a part of theOpenWAM software, it can be exported to other commercial waveaction models. An example is provided of exporting the describedmodel to GT-Power.The model has been validated using experimental results obtainedin a turbocharger test bench under pulsating flow conditions. Thecharacteristics of the pressure waves (amplitude, frequency andmean flow) are similar to those of the pulses that the compressorundergoes when working coupled to a reciprocating internalcombustion engine. This facility allows wave decomposition upstreamand downstream of the compressor. The experimental pressure waveshave been compared versus the results provided by the modelanalyzing both in frequency domain and in time domain in the twocodes used to host the model. Finally, a comparison between theproposed 1D-0D model, which furthermore applies the compressor map,and the standard methodology used by GT-Power, which directlyonly interpolates in the compressor map, has been performed.Results show better performance in the case of the proposed modeland evidence the interest for the compressor geometricaldescription

Notes:

Vendor supplied data

Publisher Number:

2012-01-0834

Access Restriction:

Restricted for use by site license