Influence of Inter-row Gap Value on Turbine Losses
This paper presents the results of a numerical investigation of the gap influence on the turbine efficiency. The rotor-stator interaction in a (1/2)-stage turbine is simulated by solving the quasi-three-dimensional unsteady Euler/Navier-Stokes equations using a parallelized numerical algorithm. The...
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| Format: | Article |
| Language: | English |
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Wiley
2001-01-01
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| Series: | International Journal of Rotating Machinery |
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| Online Access: | http://dx.doi.org/10.1155/S1023621X01000288 |
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| _version_ | 1832560554416275456 |
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| author | Paul G. A. Cizmas Corbett R. Hoenninger Shun Chen Harry F. Martin |
| author_facet | Paul G. A. Cizmas Corbett R. Hoenninger Shun Chen Harry F. Martin |
| author_sort | Paul G. A. Cizmas |
| collection | DOAJ |
| description | This paper presents the results of a numerical investigation of the gap influence on the turbine efficiency. The rotor-stator interaction in a (1/2)-stage turbine is simulated by
solving the quasi-three-dimensional unsteady Euler/Navier-Stokes equations using a
parallelized numerical algorithm. The reduced turnaround time and cost/MFLOP of
the parallel code was crucial to complete the numerous run cases presented in this
paper. The inter-row gap effect is evaluated for 4 gaps, 3 radial positions and 3 angular
velocities. As expected, the results presented in this paper show that the efficiency
increases and losses decrease while the gap size increases. The maximum efficiency
location, however, corresponds to values of the gap size which may be too large for
practical use (approximately inch). Fortunately, a local maximum efficiency and
minimum losses location has been found at approximately 0.5 inches gap size. The
efficiency variation near the local optimum is large, in some configurations being as high
as 1.4 points for a gap size variation of only 0.076 inches. Data produced by the
numerical simulations can be used to develop a design rule based on the inter-row gap
size. |
| format | Article |
| id | doaj-art-c9416469c7f54be0af096634628f5670 |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 2001-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-c9416469c7f54be0af096634628f56702025-02-03T01:27:18ZengWileyInternational Journal of Rotating Machinery1023-621X2001-01-017533534910.1155/S1023621X01000288Influence of Inter-row Gap Value on Turbine LossesPaul G. A. Cizmas0Corbett R. Hoenninger1Shun Chen2Harry F. Martin3Department Of Aerospace Engineering, Texas A & M University, College Station, Texas 77843-3141, USADepartment Of Aerospace Engineering, Texas A & M University, College Station, Texas 77843-3141, USASiemens Westinghouse Power Corporation, Orlando, Florida 32826-2399, USASiemens Westinghouse Power Corporation, Orlando, Florida 32826-2399, USAThis paper presents the results of a numerical investigation of the gap influence on the turbine efficiency. The rotor-stator interaction in a (1/2)-stage turbine is simulated by solving the quasi-three-dimensional unsteady Euler/Navier-Stokes equations using a parallelized numerical algorithm. The reduced turnaround time and cost/MFLOP of the parallel code was crucial to complete the numerous run cases presented in this paper. The inter-row gap effect is evaluated for 4 gaps, 3 radial positions and 3 angular velocities. As expected, the results presented in this paper show that the efficiency increases and losses decrease while the gap size increases. The maximum efficiency location, however, corresponds to values of the gap size which may be too large for practical use (approximately inch). Fortunately, a local maximum efficiency and minimum losses location has been found at approximately 0.5 inches gap size. The efficiency variation near the local optimum is large, in some configurations being as high as 1.4 points for a gap size variation of only 0.076 inches. Data produced by the numerical simulations can be used to develop a design rule based on the inter-row gap size.http://dx.doi.org/10.1155/S1023621X01000288Unsteady flowRotor-stator interactionTurbine flowNumerical simulationParallel computation. |
| spellingShingle | Paul G. A. Cizmas Corbett R. Hoenninger Shun Chen Harry F. Martin Influence of Inter-row Gap Value on Turbine Losses International Journal of Rotating Machinery Unsteady flow Rotor-stator interaction Turbine flow Numerical simulation Parallel computation. |
| title | Influence of Inter-row Gap Value on Turbine Losses |
| title_full | Influence of Inter-row Gap Value on Turbine Losses |
| title_fullStr | Influence of Inter-row Gap Value on Turbine Losses |
| title_full_unstemmed | Influence of Inter-row Gap Value on Turbine Losses |
| title_short | Influence of Inter-row Gap Value on Turbine Losses |
| title_sort | influence of inter row gap value on turbine losses |
| topic | Unsteady flow Rotor-stator interaction Turbine flow Numerical simulation Parallel computation. |
| url | http://dx.doi.org/10.1155/S1023621X01000288 |
| work_keys_str_mv | AT paulgacizmas influenceofinterrowgapvalueonturbinelosses AT corbettrhoenninger influenceofinterrowgapvalueonturbinelosses AT shunchen influenceofinterrowgapvalueonturbinelosses AT harryfmartin influenceofinterrowgapvalueonturbinelosses |