Performance Study for Guidance of a Missile using Flow Effectors at Different Roll Angle Positions
Abstract
This project was part of DRDC technology investment found (TIF) project "Supersonic Missile Flight Control by Manipulation of the Flow Structure using Micro-Actuated Surfaces". The objective was to evaluate the performance of an active flow control in the form of a rectangular flow effectors and knife-edge flow effectors with the aim of controlling a missile. Flow effectors at different roll angle positions on the surface of the missile nose were evaluated numerically for their impact on overall system performance for a missile flying at angles of attack from five to twenty degrees. A series of CFD analyses were carried out on an aerodynamic geometry with two different shapes of flow effectors. For the knife-edge flow effectors. five roll angle positions were analyzed. Seven roll angle positions with one rectangular flow effector and three roll angle positions with three rectangular flow effector were analysed. The experience gained during previous work was used as a guideline for determining the meshing strategy to be adopted, the turbulence model to be used with the correct near wall model with a Y+ around 1. From the gained experience, the mesh should be very fine and structured near the wall with a smooth mesh variation in the vortex perturbed region. The more accurate turbulence model was the realizable k-epsilon. The calculations showed that a good side force generation was possible for one flow effector at roll angle position between 225 degrees and 270 degrees. Those results correlated well with wind tunnel measurement between 5 degrees and 15 degrees angle of attack. Calculations with three flow effectors showed a small improvement in the performance compared to the best performing single flow effector configuration. Finally, knife-edge flow effectors did not produce the same aerodynamic coefficients as the rectangular flow effector.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2004
- Accession Number
- ADA637778
Entities
People
- Pierre Gosselin
- Pierre-antoine Rainville