Computational Fluid Dynamics (CFD)

Computational Fluid Dynamics (CFD) refers to the process of calculating how a fluid, usually air, flows around an object. There are a number of different methods ranging from quick and simple lifting line to full Navier Stokes volume flow with heat transfer and reacting gas chemistry.

TLG CFD Design Services:

  • Preliminary Design Analysis including Control Surface Sizing for Conceptual Aircraft Performance, Stability and Control
  • External and Internal Aerodynamic Flow Modeling, Air or Water
  • Aerodynamic Impact of a Proposed Change to an Existing Aircraft Such as a Radome
  • Aircraft Performance Prediction, Measurement and Model Validation
  • Evaluation of Aircraft Stability and Control in All Phases of Flight
  • Propulsion Installation Effects and Installed Performance of Jet Engines
  • Free Surface Interaction (ships on water surface)

What CFD Programs does TLG Use?

At TLG, we employ a range of CFD tools including MSES for 2D airfoil optimization and analysis, Vortex Lattice methods for stability derivatives and initial design and the 3D full Navier Stokes STAR-CCM+ flow solver which is capable of unsteady flow calculations with heat transfer and 6DOF fluid-body interaction!

What Type of CFD Applications Does TLG Do?

While CFD was originally developed for aircraft design, there are now a huge number of non-aerospace applications ranging from electronics cooling to soccer ball design. At TLG, our application experience is primarily in aircraft design and analysis including airfoil design, engine inlets and full aircraft analysis at low speed, transonic and supersonic Mach numbers. We have experience with both at steady and unsteady flow conditions. In addition, TLG has analyzed underwater vehicles including free surface flow.

How Can I Trust an Answer from CFD?

While CFD programs have gotten faster and easier to use, it is important to make sure the answer coming out of the program is the right answer. When it comes to getting good results, it is vital that the user has a thorough understanding of the program, of the physics being solved by the CFD program and an extensive experience base of validation cases. TLG has extensive experience in practical CFD application to typical aerospace problems and has validated results against tunnel and flight test data whenever possible. Lastly, TLG CFD solutions are always “sanity checked” against a simpler method (hand book, empirical integration, etc.) to verify the “answer” is reasonable.