Advanced

A Detailed Analysis of Radial Turbines

Svensson, Erik LU (2014)
Abstract
The field of radial turbines is wide and radial turbines of today find applications inareas as diverse as small gas turbines; turbochargers for cars, buses, and trucks, railwaylocomotives, and diesel power generators; cryogenic and process expanders; rocket engineturbopumps; and specialty steam turbines, [12]. The three-dimensional flow inside aradial turbine is complex and ever since the radial turbine was introduced on the market,a desire to model this flow with simple correlations and loss models has existed.This master thesis consist of two studies. In the first study two radial turbines aremodeled on a mean-line basis and the performance of different operating conditionsare simulated.... (More)
The field of radial turbines is wide and radial turbines of today find applications inareas as diverse as small gas turbines; turbochargers for cars, buses, and trucks, railwaylocomotives, and diesel power generators; cryogenic and process expanders; rocket engineturbopumps; and specialty steam turbines, [12]. The three-dimensional flow inside aradial turbine is complex and ever since the radial turbine was introduced on the market,a desire to model this flow with simple correlations and loss models has existed.This master thesis consist of two studies. In the first study two radial turbines aremodeled on a mean-line basis and the performance of different operating conditionsare simulated. The results are compared to test data to evaluate the accuracy of thesimulations. In the second and final study an aerodynamic design of a radial turbine isconducted. Initially a preliminary design is considered. This design is evaluated withthe same mean-line tool which were used to simulate the two turbines already mentionedand additionally a blade-to-blade tool. The preliminary design is revised, based on theevaluations, to a detailed design. The detailed design is evaluated with the same toolsas the preliminary design and changed until it meets the requirements stated.The results from the simulations show good agreement with the test data and it can,therefore, be concluded that it would be possible to evaluate a new design using themean-line tool used in this thesis. It is, however, naive to think that a mean-line analysisis able to predict the flow completely and thus the mean-line analysis should be viewedas a tool which is able to speed up the design process. It is difficult to judge theaerodynamic design from the second study because it would require for the turbine tobe manufactured and tested. However, the design shows promise according to the one-and two-dimensional analyses preformed. (Less)
Abstract (Swedish)
The field of radial turbines is wide and radial turbines of today find applications in areas as diverse as small gas turbines; turbochargers for cars, buses, and trucks, railway locomotives, and diesel power generators; cryogenic and process expanders; rocket engine turbopumps; and specialty steam turbines. The three-dimensional flow inside a radial turbine is complex and ever since the radial turbine was introduced on the market, a desire to model this flow with simple correlations and loss models has existed.

This master thesis consist of two studies. In the first study two radial turbines are modeled on a mean-line basis and the performance of different operating conditions are simulated. The results are compared to test data... (More)
The field of radial turbines is wide and radial turbines of today find applications in areas as diverse as small gas turbines; turbochargers for cars, buses, and trucks, railway locomotives, and diesel power generators; cryogenic and process expanders; rocket engine turbopumps; and specialty steam turbines. The three-dimensional flow inside a radial turbine is complex and ever since the radial turbine was introduced on the market, a desire to model this flow with simple correlations and loss models has existed.

This master thesis consist of two studies. In the first study two radial turbines are modeled on a mean-line basis and the performance of different operating conditions are simulated. The results are compared to test data to evaluate the accuracy of the simulations. In the second and final study an aerodynamic design of a radial turbine is conducted. Initially a preliminary design is considered. This design is evaluated with the same mean-line tool which were used to simulate the two turbines already mentioned and additionally a blade-to-blade tool. The preliminary design is revised, based on the evaluations, to a detailed design. The detailed design is evaluated with the same tools as the preliminary design and changed until it meets the requirements stated.

The results from the simulations show good agreement with the test data and it can, therefore, be concluded that it would be possible to evaluate a new design using the mean-line tool used in this thesis. It is, however, naive to think that a mean-line analysis is able to predict the flow completely and thus the mean-line analysis should be viewed as a tool which is able to speed up the design process. It is difficult to judge the aerodynamic design from the second study because it would require for the turbine to be manufactured and tested. However, the design shows promise according to the one- and two-dimensional analyses preformed. (Less)
Please use this url to cite or link to this publication:
author
supervisor
organization
alternative title
En detaljerad analys av radialturbiner
publishing date
type
Thesis
publication status
published
subject
publisher
Lund University, Lund Institute of Technology
language
English
LU publication?
yes
id
21d8d39a-1490-4280-8de1-fc4a01560bde
date added to LUP
2019-01-31 13:47:41
date last changed
2019-03-11 17:17:29
@misc{21d8d39a-1490-4280-8de1-fc4a01560bde,
  abstract     = {The  field  of  radial  turbines  is  wide  and  radial  turbines  of  today  find  applications  inareas as diverse as small gas turbines; turbochargers for cars, buses, and trucks, railwaylocomotives, and diesel power generators; cryogenic and process expanders; rocket engineturbopumps;  and  specialty  steam  turbines,  [12].   The  three-dimensional  flow  inside  aradial turbine is complex and ever since the radial turbine was introduced on the market,a desire to model this flow with simple correlations and loss models has existed.This  master  thesis  consist  of  two  studies.   In  the  first  study  two  radial  turbines  aremodeled  on  a  mean-line  basis  and  the  performance  of  different  operating  conditionsare simulated.  The results are compared to test data to evaluate the accuracy of thesimulations.  In the second and final study an aerodynamic design of a radial turbine isconducted.  Initially a preliminary design is considered.  This design is evaluated withthe same mean-line tool which were used to simulate the two turbines already mentionedand additionally a blade-to-blade tool.  The preliminary design is revised, based on theevaluations, to a detailed design.  The detailed design is evaluated with the same toolsas the preliminary design and changed until it meets the requirements stated.The results from the simulations show good agreement with the test data and it can,therefore,  be  concluded  that  it  would  be  possible  to  evaluate  a  new  design  using  themean-line tool used in this thesis.  It is, however, naive to think that a mean-line analysisis able to predict the flow completely and thus the mean-line analysis should be viewedas  a  tool  which  is  able  to  speed  up  the  design  process.   It  is  difficult  to  judge  theaerodynamic design from the second study because it would require for the turbine tobe manufactured and tested.  However, the design shows promise according to the one-and two-dimensional analyses preformed.},
  author       = {Svensson, Erik},
  language     = {eng},
  month        = {05},
  publisher    = {Lund University, Lund Institute of Technology},
  title        = {A Detailed Analysis of Radial Turbines},
  url          = {https://lup.lub.lu.se/search/ws/files/57470044/exjobb_final_official_version_Erik_Svensson.pdf},
  year         = {2014},
}