Effect of Geometric Parameters on the Aerodynamic Characteristics of Grid-Fin Cells at Supersonic Speeds

Theerthamalai, P.; Balakrishnan, N.

doi:10.2514/6.2007-690

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…3 Extensive research onto deciphering the rudimentary flow-physics associated with these fins had been carried out globally since the 1970s. Studies involved theoretical methods by utilizing the vortex lattice theory, [11][12][13] Prandtl-Meyer shock expansion theory, 14 and many other methods 15,16 for grid fin aerodynamic prediction and design optimization.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of cell pattern on grid fin aerodynamics in subsonic flow

Tripathi

Sucheendran

Misra

2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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Grid fins consisting of a lattice of high aspect ratio planar members encompassed by an outer frame are unconventional control surfaces used on numerous missiles and bombs due to their enhanced lifting characteristics at high angles of attack and across wider Mach number regimes. The current paper accomplishes and compares the effect of different grid fin patterns on subsonic flow aerodynamics of grid fins by virtue of the determination of their respective aerodynamic forces. Furthermore, this study deliberates the impact of gap variation on aerodynamics of different patterns. Results enunciate enhanced aerodynamic efficiency, and lift slope for web-fin cells and single diamond patterns compared to the baseline model. Moreover, the study indicates improved aerodynamic performance for diamond patterns with higher gaps by providing elevated maximum lift coefficient, delayed stall angle, and comparable drag at lower angles. The study established the presence of an additional effect termed as the inclination effect alongside the cascade effect leading to deviations with respect to lift, stall, and aerodynamic efficiency amongst different gap variants of the individual patterns. Thus, optimization based on the aerodynamic efficiency, stall angle requirements, and construction cost by optimum pattern and gap selection can be carried out through this analysis, which can lead to elevated aerodynamic performance for grid fins.

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Section: Introductionmentioning

confidence: 99%

Experimental analysis of cell pattern on grid fin aerodynamics in subsonic flow

Tripathi

Sucheendran

Misra

2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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Test Technique Research for the Hinge Moment of a Grid Fin in High Speed Wind Tunnel

Chen

Liu

2014

AMM

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In order to study the test technique for the hinge moment of a grid fin in wind tunnel, a platform based on half model support technique was established in FL-23 and FL-31 wind tunnel in China Aerodynamics Research & Development Center (CARDC). The platform developed a wind tunnel test balance, rudder control system and the aerodynamics measurement system. This test technique was important to optimize aerodynamic configurations of a grid fin, design or evaluate the capability of the rudder control system. Nomenclature

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Effect of Geometric Parameters on the Aerodynamic Characteristics of Grid-Fin Cells at Supersonic Speeds

Cited by 2 publications

References 7 publications

Experimental analysis of cell pattern on grid fin aerodynamics in subsonic flow

Experimental analysis of cell pattern on grid fin aerodynamics in subsonic flow

Test Technique Research for the Hinge Moment of a Grid Fin in High Speed Wind Tunnel

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