![]() and Anttonen J., “ Transonic Store Separation Using Unstructured CFD with Dynamic Meshing,” 33rd AIAA Fluid Dynamics Conference and Exhibit, AIAA Paper 2003-3919, June 2003. and Nichols R., “ Time-Accurate CFD Predictions for the JDAM Separation from an F-18C Aircraft,” 38th Aerospace Sciences Meeting and Exhibit, AIAA Paper 2000-0796, 2000. and Feldhun A., “ Application of Unstructured Adaptive Moving Body Methodology to the Simulation of Fuel Tank Separation from an F-16 Fighter,” 35th Aerospace Sciences Meeting and Exhibit, AIAA Paper 1997-0166, Jan. 1997. E., “ Time-Accurate Computational Fluid Dynamics Approach to Transonic Store Separation Trajectory Prediction,” Journal of Aircraft, Vol. 31, No. 4, 1994, pp. 886–891. “ Military Handbook Guide to Aircraft/Stores Compatibility,” Naval Air Engineering Center Rept. This can be used to plan an optimal ejection profile. A practical observation is that the store roll is dependent on the relation between the ejection period and the low structural frequencies of the wing. The dynamic wing response plays a major role in generating the store roll, in different conditions of friction between the store body and ejection piston. Store ejection from an asymmetric configuration (of a single store) yielded a very similar store roll compared to the symmetric ejection. A more flexible wing, a heavier store, a larger ejection force, or a shorter ejection period all result in increased store rolling. The second part of the paper presents a parametric study of the effects of various structural and configurational parameters on the wing’s response and consequently on the store’s rolling motion. This roll motion is due to misalignment of the ejection force vector and the store’s center of gravity, due to the wing’s static and dynamic elastic deformations. Simultaneous, time-accurate analysis of the dynamic aeroelastic wing response and the store’s trajectory reveals that the most significant aeroelastic effect is a roll motion developed by the store. ![]() The stores are ejected during straight and level flight at M = 0.35, 2500 m. The nominal test case is that of an unmanned aerial vehicle that carries two identical stores on two wing stations. The study explores wing elasticity effects on the store-separation process.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |