Downwash & Induced Drag The flow pattern at the tip of the finite wing generates a vortical flow field. The trailing vortices create a ‘downwash’ at the wing that rotates the freestream velocity downwards vectorially. These vortices make the resultant lift force vector rotate backward, which gives rise to a force that is in the…
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My PhD Journey: Attempt at Blog 1
PhD journey is daunting. Make no exceptions from that. The overall journey will transform you as an individual, be rest assured. Right from the gruelling admission procedure to getting used to the university rules and regulations, guidelines, coursework registration (more so in this online study mode), carrying out the coursework in the first year.
Control & Guidance : A primer
The major lift producing component of an aerospace vehicle is the wing surface and the control deflection is provided by the control surfaces. When the control moment and the aerodynamic moment are balanced, this state is called the trim state of the vehicle. For a statically stable vehicle(C.G. ahead of C.P.), the control moment generated…
Steady vs. Unsteady state CFD analysis
In nature, almost all turbulent flows are invariably ‘unsteady‘. What is prescribed as ‘steady‘ is the statistical averaged variable, provided that the flow has an energy equilibrium condition. In such cases, one correct formulation is the steady RANS. Other pure unsteady statistical formulations exist, such as unsteady RANS (URANS). In a specific flow problem, viz. flow around a…