COMPUTATIONAL FLUID DYNAMICS OF STORE SEPARATION

JAI ASSOCIATES, INC. PROPOSES TO DEVELOP A THREE-DIMENSIONALCOMPUTATIONAL FLUID DYNAMICS CODE TO PROVIDE RELIABLE, ECONOMIC COMPUTATIONS OF STORE SEPARATION FROM AN AIRCRAFT. STARTING FROM THE EXISTING THREE-DIMENSIONAL STATIC CHIMERA NAVIER-STOKES CODE, MODIFICATIONS WILL BE ADDED PERMITTING STORES TO BE TIME-ACCURATELY DROPPED FROM A WING. TO ACCOMPLISH THIS OBJECTIVE, ROUTINES WILL BE MODIFIED OR WRITTEN TO CALCULATE STORE AERODYNAMIC FORCES AND MOMENTS, STORE TRAJECTORIES, FLOW FIELDS OF MOVING BODIES, AND INTERPOLATED BOUNDARY VALUES BETWEEN EMBEDDED MESHES. A MANAGEMENT WILL BE DEVELOPED TO INCLUDE THE ABOVEMODIFIED ROUTINES IN A COMPLETE TIMESTEP CYCLE. WHENEVER POSSIBLE THE CODE WILL BE VALIDATED BY COMPARISON WITH EXPERIMENTS. PHASE I PROVIDES A 6-MONTH STUDY OF THE 3-D STATIC CHIMERA NAVIER-STOKES CODE TO DETERMINE HOW TO BEST MODIFY IT FOR DYNAMIC STORE SEPARATION. THE CHIMERA CODE WILL BE OBTAINEDFROM NASA AMES RESEARCH CENTER AND MODIFIED FOR A STATIC WING/STORE CALCULATION. THEN TO CONVERT THE CODE TO A DYNAMIC STORE SEPARATION CODE, ISSUES PERTINENT TO STORE SEPARATION WILL BE IDENTIFIED, SOLUTION THEORY WILL BE FORMULATED TO RESOLVE THE ISSUES AND FINALLY, SOME MODIFICATIONS WILL BE MADE TO THE CHIMERA CODE. PHASE II AND THE FOLLOWON EFFORTS PROVIDE ADDTITIONAL MAN-YEARS TO COMPLETE THE TASK GENERATED BY PHASE I. JAI ASSOCIATES PERSONNEL ARE UNIQUELY QUALIFIED TO UNDERTAKE THIS WORK SINCE THEY ARE RECOGNIZED LEADERS IN CFD DEVELOPMENT.