Results 291 to 300 of about 142,074 (316)
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2014
The dynamics of the turbulent three-dimensional wake generated by an axisymmetric bluff body with blunt trailing edge are experimentally and theoretically investigated at a diameter based Reynolds number of 188,000. A detailed analysis of the base pressure measurements shows that the large scale structures of the turbulent three-dimensional wake retain
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The dynamics of the turbulent three-dimensional wake generated by an axisymmetric bluff body with blunt trailing edge are experimentally and theoretically investigated at a diameter based Reynolds number of 188,000. A detailed analysis of the base pressure measurements shows that the large scale structures of the turbulent three-dimensional wake retain
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2017
Different models of wake expansion are presented in this chapter: the 1D momentum theory model, the cylinder analog model and Theodorsen’s model. Far wake models such as the ones from Frandsen or Rathmann or only briefly mentioned. The different models are compared to each other. Results from this chapter are used in Chap.
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Different models of wake expansion are presented in this chapter: the 1D momentum theory model, the cylinder analog model and Theodorsen’s model. Far wake models such as the ones from Frandsen or Rathmann or only briefly mentioned. The different models are compared to each other. Results from this chapter are used in Chap.
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Stochastic model for turbulent, reacting wakes
Aerothermochemistry of Turbulent Flows Conference, 1965Electron density fluctuations in a turbulent wake are examined by means of a stochastic model. The gas velocity fluctuations are prescribed, both in mean values and in statistical properties, and the chemical rate and continuity equations are solved for an ensemble of velocity samples.
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Aerodynamic Investigation of Hover Using Vortex Ring Wake Model and Free Vortex Wake Model
AIAA SCITECH 2025 ForumModeling rotor inflow and wake dynamics is fundamental to understanding and improving rotorcraft performance. Especially, hover modeling plays an important role in aircraft design, aerodynamic assessments, and the development of control systems for helicopters and eVTOLs.
Öztürk, İldeniz, Sezer Uzol, Nilay
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Propeller Wake Alignment Models
SNAME 8th Propeller and Shafting Symposium, 1997Various wake alignment techniques which have been developed in the past for the analysis of non-cavitating propellers in uniform inflows are reviewed and some of them are extended in the case of cavitating flows subject to inclined inflows. The effect of the inclined trailing wake geometry on the predicted cavities and blade forces is found to be ...
Spyros A. Kinnas, Sangwoo Pyo
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Validation of a State-Space Free Wake Model with a Near-Wake Vortex Lattice Model
Proceedings of the Vertical Flight Society 81st Annual Forum and Technology DisplayThis paper presents the implementation and validation of a state-space free-vortex wake model with a vortex lattice near-wake formulation, developed for rotorcraft applications. The model is expressed in state-variable form as a nonlinear time-periodic (NLTP) system in first-order structure, enabling linearization and simplification through time ...
Batin Bugday +3 more
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Wake and wind farm modelling. Part B: Wake gust modelling
1993The Department of Fluid Dynamics of TNO Environmental and EnergyResearch has coordinated the CEC JOULE project Wake and Wind Farm Modelling.The project resulted in:— two modular wind farm codes;- the gust model WAKEGUST.The wind farm codes are described in part A of the project report.
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Advancement of an analytical double-Gaussian full wind turbine wake model
Renewable Energy, 2021Aidan Keane
exaly