Flow Control for Enhanced Store Separation

Shipman, Jeremy; Arunajatesan, Srinivasan; Cavallo, Peter A.; Birkbeck, Roger; Sinha, Neeraj; Ukeiley, Lawrence; Alvi, Farrukh S.

doi:10.2514/6.2007-1239

Cited by 18 publications

(7 citation statements)

References 8 publications

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“…Delivery from cavity has many advantages, including reducing the rate of radar discovery, reducing the aerodynamic drag and increasing the range of the bomber [1][2][3][4]. However, the size of the interior of the aircraft is often limited.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Aerodynamic of Expand Folding Rudder Separator Delivery from Cavity

Xue¹,

Jin²,

Wang³

2020

Int J Astronaut Aeronautical Eng

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In the subsonic, transonic and supersonic wind tunnels, the launching test technology of the buried separators in folding rudder separator is studied. In view of the two different folding modes of the Separator rudder surface, two testing techniques are developed for the horizontal folding and vertical folding of the rudder surface, which can ensure the self locking function before and after the rudder surface is unfolded. The folding and unfolding state is not affected by the start impact of the wind tunnel and the turbulence. At the same time, the position of the rudder surface is expanded to achieve the real launch and expansion of the simulated separator. The developed dual angle of view, high brightness optical path system and six degree of freedom image analysis system can obtain the full trajectory image and aerodynamic parameters of the projectile embedded in the aircraft. The test technology can independently adjust the ejection speed and angular velocity of the release material, and can study the influence of different separation conditions on the separation safety. The non-expansion test technology of the rudder surface has completed the wind tunnel test verification under the condition of supersonic velocity and multi-body interference and complex aerodynamic force, which meets the demand of the launch and wind tunnel test research.

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Section: Introductionmentioning

confidence: 99%

Investigation of Aerodynamic of Expand Folding Rudder Separator Delivery from Cavity

Xue¹,

Jin²,

Wang³

2020

Int J Astronaut Aeronautical Eng

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“…It would be very meaningful to simplify the separation problem of light stores and obtain a more widely used similarity law design method for ejection free flight test in high-speed wind tunnel. If we want to satisfy the similarity of angular displacement, we need to satisfy equation (1). We define the lightweight objects first…”

Section: Definition Of Light Storementioning

confidence: 99%

“…In the process of store separation, due to the high flight speed, there is complex flow interference between the store and the carrier, which easily leads to the separation failure and even the collision between the store and the carrier, threatening flight safety. 1,2 In this regard, domestic and research institutions have also made a lot of explorations. In 1983, Robert L. Stallings 3 of National Aeronautics and Space Administration (NASA) Langley Research Center and others used wind tunnel tests to study the effect of different sizes of embedded capsules on missile separation under the condition of M = 2.36.…”

Section: Introductionmentioning

confidence: 99%

Free flight wind tunnel test similarity law derivation for light store separation from aircraft

Xue

Qin

Wang

et al. 2019

Advances in Mechanical Engineering

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Based on the linear displacement motion similarity and angular displacement motion similarity, the similarity law for free flight test of light store separation from aircraft is deduced. The problem that the ideal test model is too light to be processed and the free flight separation test in wind tunnel is harder to achieve due to the model scaling is solved. The new similarity law was simplified reasonably, and the relationship equation between separation velocity and model mass was obtained. The wind-loaded state is simulated by computational fluid dynamics, and the real separation data of aircraft, the separation data of previous test methods, and the simulation data of different mass and different separation velocity trajectories of this similarity law are obtained. The improved effect of the new similarity law is verified by data comparison. The results show that by properly increasing the mass of wind tunnel test model, the difficulty of wind tunnel test can be greatly reduced while the separation trajectory is similar, and the angular displacement error can be guaranteed to be within acceptable range. In order to ensure better consistency between flight and free flight wind tunnel test, it solves the problem that similarity law can only be designed but cannot be realized.

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“…Complex configurations, in terms of the shape of the cavity itself, have also been studied [44,50], although the geometry was still symmetrical about the cavity centreline and the incoming flow was modelled using a flat plate.…”

Section: Previous Work On Ucavs and Cavity Flowsmentioning

confidence: 99%