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Abstract
An experimental data base on attached and separated flow transitional boundary layers, under various levels of free-stream turbulence, Reynolds number and pressure gradient is composed, with the aim of providing high-accuracy data and boundary conditions for development and testing of laminar-to-turbulent transition models. Experiments were carried out in a test section allowing variation of the pressure gradient imposed to the boundary layer developing on a flat plate installed within a variable area opening endwall channel. Time resolved PIV and LDV data have been acquired to provide the boundary layer evolution, as well as the freestream properties in terms of mean velocity and fluctuating velocity components. The overall testmatrix spans 3 Reynolds numbers, 4 free-stream turbulence intensity levels and 4 pressure gradients. This large variation of flow parameters allows a gradual shift of the mode of transition from a by-pass process in attached flow, occurring with zero (Blasius like) and mild adverse pressure gradients at high free-stream turbulence, to separated flow transition, occurring with low Reynolds number, low free-stream turbulence intensity and elevated adverse pressure gradient.
Keywords
boundary layer transition

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Chicago
Simoni, Daniele, Matteo Dellacasagrande, Davide Legnani, Slawomir Kubacki, and Erik Dick. 2018. “Development of an Accurate Data Base on Transitional Flows in Variable Pressure Gradients.” In Proceedings 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Meassurements, ed. Frank Nicoud, Bernard Geurts, Ananias Tomboulides, Stefan Hickel, Dominic von Terzi, and Simon Mendez. London: Ercoftac.
APA
Simoni, Daniele, Dellacasagrande, M., Legnani, D., Kubacki, S., & Dick, E. (2018). Development of an accurate data base on transitional flows in variable pressure gradients. In Frank Nicoud, B. Geurts, A. Tomboulides, S. Hickel, D. von Terzi, & S. Mendez (Eds.), Proceedings 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Meassurements. Presented at the 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, London: Ercoftac.
Vancouver
1.
Simoni D, Dellacasagrande M, Legnani D, Kubacki S, Dick E. Development of an accurate data base on transitional flows in variable pressure gradients. In: Nicoud F, Geurts B, Tomboulides A, Hickel S, von Terzi D, Mendez S, editors. Proceedings 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Meassurements. London: Ercoftac; 2018.
MLA
Simoni, Daniele et al. “Development of an Accurate Data Base on Transitional Flows in Variable Pressure Gradients.” Proceedings 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Meassurements. Ed. Frank Nicoud et al. London: Ercoftac, 2018. Print.
@inproceedings{8604765,
  abstract     = {An experimental data base on attached and separated flow transitional boundary layers, under various levels of free-stream turbulence, Reynolds number and pressure gradient is composed, with the aim of providing high-accuracy data and boundary conditions for development and testing of laminar-to-turbulent transition models. Experiments were carried out in a test section allowing variation of the pressure gradient imposed to the boundary layer developing on a flat plate installed within a variable area opening endwall channel. Time resolved PIV and LDV data have been acquired to provide the boundary layer evolution, as well as the freestream properties in terms of mean velocity and fluctuating
velocity components. The overall testmatrix spans 3 Reynolds numbers, 4 free-stream turbulence intensity levels and 4 pressure gradients. This large variation of flow parameters allows a gradual shift of the mode of transition from a by-pass process in attached flow, occurring with zero (Blasius like) and mild adverse pressure gradients at high free-stream turbulence, to separated flow transition, occurring with low Reynolds number, low free-stream turbulence intensity and elevated adverse pressure gradient.},
  author       = {Simoni, Daniele and Dellacasagrande, Matteo and Legnani, Davide and Kubacki, Slawomir and Dick, Erik},
  booktitle    = {Proceedings 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Meassurements},
  editor       = {Nicoud, Frank and Geurts, Bernard and Tomboulides, Ananias and Hickel, Stefan and von Terzi, Dominic and Mendez, Simon},
  language     = {eng},
  location     = {Montpellier},
  pages        = {6},
  publisher    = {Ercoftac},
  title        = {Development of an accurate data base on transitional flows in variable pressure gradients},
  year         = {2018},
}