Experimental study of laminar separation phenomenon combining with numerical calculations
The separation is much more sensitive for laminar flow than for turbulent flow. These remarks have been attested for both subsonic and supersonic flows. However, they are not applicable to transonic flows when there are interactions between boundary layer and shock wave. Along with the Reynolds numb...
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| Format: | Article |
| Language: | English |
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Publishing House for Science and Technology
2011-06-01
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| Series: | Vietnam Journal of Mechanics |
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| Online Access: | https://vjs.ac.vn/index.php/vjmech/article/view/41 |
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| _version_ | 1849765990753107968 |
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| author | Nguyen Manh Hung Hoang Thi Bich Ngoc |
| author_facet | Nguyen Manh Hung Hoang Thi Bich Ngoc |
| author_sort | Nguyen Manh Hung |
| collection | DOAJ |
| description | The separation is much more sensitive for laminar flow than for turbulent flow. These remarks have been attested for both subsonic and supersonic flows. However, they are not applicable to transonic flows when there are interactions between boundary layer and shock wave. Along with the Reynolds number, the Mach number is a necessary dimensionless parameter for the condition and the mechanism of separations. The report presents one part of studies on laminar separation with Mach number of incompressible flow. The laminar regimes correspond to flows through wind turbine blades. Our experimental work for laminar separation phenomenon was carried out in a subsonic open circuit wind tunnel by taking photographs. The accuracy of experimental results basically depends on the accuracy of wind tunnel and the quality of smoke on density and constitutive materials. Experimental results permit to determine the position of separation and the form of turbulent region followed from the separation point. Numerical studies were simultaneously realized. Based on obtained experimental and numerical results, the report presents also the comparison between the laminar separation and the turbulent separation. |
| format | Article |
| id | doaj-art-c69410ba58874110a4e37ff716b1ebdc |
| institution | DOAJ |
| issn | 0866-7136 2815-5882 |
| language | English |
| publishDate | 2011-06-01 |
| publisher | Publishing House for Science and Technology |
| record_format | Article |
| series | Vietnam Journal of Mechanics |
| spelling | doaj-art-c69410ba58874110a4e37ff716b1ebdc2025-08-20T03:04:43ZengPublishing House for Science and TechnologyVietnam Journal of Mechanics0866-71362815-58822011-06-0133210.15625/0866-7136/33/2/41Experimental study of laminar separation phenomenon combining with numerical calculationsNguyen Manh Hung0Hoang Thi Bich Ngoc1Hanoi University of TechnologyHanoi University of TechnologyThe separation is much more sensitive for laminar flow than for turbulent flow. These remarks have been attested for both subsonic and supersonic flows. However, they are not applicable to transonic flows when there are interactions between boundary layer and shock wave. Along with the Reynolds number, the Mach number is a necessary dimensionless parameter for the condition and the mechanism of separations. The report presents one part of studies on laminar separation with Mach number of incompressible flow. The laminar regimes correspond to flows through wind turbine blades. Our experimental work for laminar separation phenomenon was carried out in a subsonic open circuit wind tunnel by taking photographs. The accuracy of experimental results basically depends on the accuracy of wind tunnel and the quality of smoke on density and constitutive materials. Experimental results permit to determine the position of separation and the form of turbulent region followed from the separation point. Numerical studies were simultaneously realized. Based on obtained experimental and numerical results, the report presents also the comparison between the laminar separation and the turbulent separation.https://vjs.ac.vn/index.php/vjmech/article/view/41laminar separationexperimental studynumerical calculation |
| spellingShingle | Nguyen Manh Hung Hoang Thi Bich Ngoc Experimental study of laminar separation phenomenon combining with numerical calculations Vietnam Journal of Mechanics laminar separation experimental study numerical calculation |
| title | Experimental study of laminar separation phenomenon combining with numerical calculations |
| title_full | Experimental study of laminar separation phenomenon combining with numerical calculations |
| title_fullStr | Experimental study of laminar separation phenomenon combining with numerical calculations |
| title_full_unstemmed | Experimental study of laminar separation phenomenon combining with numerical calculations |
| title_short | Experimental study of laminar separation phenomenon combining with numerical calculations |
| title_sort | experimental study of laminar separation phenomenon combining with numerical calculations |
| topic | laminar separation experimental study numerical calculation |
| url | https://vjs.ac.vn/index.php/vjmech/article/view/41 |
| work_keys_str_mv | AT nguyenmanhhung experimentalstudyoflaminarseparationphenomenoncombiningwithnumericalcalculations AT hoangthibichngoc experimentalstudyoflaminarseparationphenomenoncombiningwithnumericalcalculations |