Browse > Article
http://dx.doi.org/10.9766/KIMST.2017.20.1.081

An Experimental Study on Aircraft Internal Store Separation Characteristics  

An, Eunhye (Department of Mechanical Engineering, Korea Air Force Academy)
Cho, Donghyun (Department of Aerospace Engineering, Korea Air Force Academy)
Kim, Jongbum (Department of Aerospace Engineering, Korea Air Force Academy)
Jang, Youngil (Department of Aerospace Engineering, Korea Air Force Academy)
Jeong, KyeongJin (The 7th Research and Development Institute, Agency for Defense Development)
Kim, Sangjin (The 7th Research and Development Institute, Agency for Defense Development)
Lee, Hokeun (The 7th Research and Development Institute, Agency for Defense Development)
Reu, Taekyu (The 7th Research and Development Institute, Agency for Defense Development)
Chung, Hyoungseog (Department of Aerospace Engineering, Korea Air Force Academy)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.20, no.1, 2017 , pp. 81-89 More about this Journal
Abstract
This study investigates store separation characteristics of an unmanned aerial vehicle having generic stealth configuration over unsteady flow of an internal bay. Free-drop wind tunnel tests are conducted to simulate bomb releases from an internal weapons bay while high-speed camera images are taken. The images are analyzed to examine the effects of flow velocity, angle of attack, flap deflection and the ejector force application on the store separation trajectories. For the free-drop wind tunnel tests, Froude Scaling is applied to match the dynamic similarity for the bomb model, and the ejector force is simulated by using small pneumatic cylinders. The results indicate that the test bomb model safely separates from the internal bay at the given test conditions and configurations. It is also observed that the effects of the flow velocity and ejector force application have greater impacts on the separation trajectories than those of angle of attack and flap deflection.
Keywords
Unmanned Aerial Vehicle; Internal Store Separation; Free-drop Test; Froude Scaling; Bifilar Swing Method; Photogrammetry;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 E. Lazar, G. Elliott, and N. Glumac, "Control of the Shear Layer Above a Supersonic Cavity Using Energy Deposition," AIAA Journal, Vol. 46, No. 12, 2008.
2 Cenko, A., "Store Separation Lessons Learned During The Last 30 Years," 27th International Congress of the Aeronautical Sciences, ICAS 2010.
3 Rudy A, J., et al., "Store Separation Trajectory Deviations Due to Unsteady Weapons Bay Aerodynamics," AIAA 2008-188, Jan. 2008.
4 CDR Neal D. K., et al., "Non-Repeatability of Store Separation Trajectories from Internal Weapon Bays due to Unsteady Cavity Flow effects Lessons Learned from a 2D Investigation," AIAA 2011-1238, Jan. 2011.
5 Cary, A. C. and Wesley, L. P., "Airframe Integration of Modern Store, Delivary Order 0031 : Phase II & III Analytical Predictions & Validation Testing," AFRL-VA-WP-TR-2006-3079.
6 K. S. Keen, C. H. Morgret, and R. L. Arterbury, "An Analytic Investigation of Accuracy Requirements for Onboard Instrumentation and Film Data for Dynamically Scaled Wind Tunnel Drop Models," AEDC TR-96-7, pp. 87-99, 1997.
7 Barlow, J. B, Rae, W. H, Pope, A., Low-speed Wind Tunnel Testing, 3rd ed. JW & S. New York, pp. 690-694, 1999.
8 Alex Cenko, "Experience in the use of Computational Aerodynamics to Predict Store Release Characteristics," Progress in Aerospace Sciences, Vol. 37, Issue 5, pp. 477-495, 2001.   DOI
9 Yong-hyun Yoon et. al., "Experimental Study for the Safety Analysis of an External Store Separation from Fighter Aircraft," Journal of the Korean Society for Aeronautical and Space Sciences, Vo1. 37, No. 3, pp. 232-239, 2009.
10 SangJin Kim, et. al., "Photogrammetric Techniques for Safe Separation Flight Test," Journal of the Korean Society for Aeronautical and Space Sciences, Vo1. 41, No. 8, pp. 673-679, 2013.
11 http://www.imagesystems.se/image-systems-motionanalysis/products/track-eye.aspx
12 Robert L. Stallings, E. B. Plentovich, M. B. Tracy and Michael J. Hemsch, "Measurements of Store Forces and Moments and Cavity Pressures for a Generic Store In and Near a Box Cavity at Subsonic and Transonic Speeds," NASA Technical Memorandum 4611, 1995.
13 Jongbeom Kim, et. al., "An Experimental Study on Internal Store Separation Characteristics," KSAS Spring Conference, pp. 97-100, June, 2013.