Simulation of Missiles with Grid Fins Using an Actuator Disk

Reynier, Ph.; Longo, J.M.A.; Schülein, Erich

doi:10.2514/1.7939

Cited by 10 publications

(4 citation statements)

References 12 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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“…이러한 그리드핀의 공력 특성에 대한 연구는 주로 풍동시험 [2,3] 및 탄도시험 시설(Ballistics Range) [4] 등을 이용한 실험적인 연구와 해석하는 충실도의 정도에 따라 저충실도의 반경험식(Semi-Empirical 혹은 Low Fidelity, 이하 LF) [5][6][7][8][9][10] 등을 이용한 연구 그리고 고충실 도의 전산유체역학 기법(Computational Fluid Dynamics, 이하 CFD) [11][12][13] 을 이용한 연구들이 이루어져 왔다. Washington 등 [2] 은 다양한 형상의 그리드핀에 대하 여 풍동시험을 수행하고 그리드핀의 공력 특성을 파 악하고자 하였다.…”

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“…최근에는 CFD를 이용한 연구가 활발해져 Sharma 등은 그리드핀에 대하여 CFD 해석을 수행한 여러 논 문을 종합하여 발표하기도 하였다 [11] . Reynier 등 [12] 은 그리드핀을 actuator disc로 치환하고, Dikbas 등 [13] 은 UGF(Unit Grid Fin) 개념을 이용하여 CFD 계산 효율 을 높이고자 하였다.…”

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Prediction of Aerodynamic Characteristics of the Grid Fins using Low/High Fidelity Methods

Hur¹,

Nam²,

Lim³

et al. 2023

J. KIMS Technol

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To predict the aerodynamic characteristics of the grid fins from subsonic to supersonic speeds, low fidelity SW as well as CFD SW were applied. VLM(Vortex Lattice Method) and SE(Shock-Expansion) method were used at subsonic and supersonic speed domain respectively for the rapid prediction of low fidelity SW. For 2 configurations of the grid fins, the CFD computations and tests using the trisonic wind tunnel were also performed to compare the results of the grid fins. The results of low fidelity SW, CFD SW and the wind tunnel tests data were agreed well each other. Through further research on the grid fins, the effective parameters of the grid fin configurations according to the speed regime will be investigated.

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“…It is comforting that even if these are military achievements, some of them can be utilized for the benefit of humanity. For example, instead of precise bombing by means of homing missiles with grid fins [6], Elon Musk from SpaceX used such type of missile guidance system to partially reusable launch systems Falcon 9 of which the first stage having the ability to re-enter the atmosphere and landing back vertically after separating from the second stage.…”

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confidence: 99%

Potential Opportunities for Development of Mechanical Engineering with The Context of Historical Evolution of This Engineering Branch

Jackiewicz

2020

JOMME

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Mechanical engineering is not only one of the oldest engineering disciplines but also the broadest one, i.e., with the wide-scope as well as a large number of its branches. This engineering discipline requires a clear understanding of the principles of engineering physics, engineering mathematics, and materials science to design, analyze, manufacture, and maintain mechanical systems such as mechanisms, devices, and machines.With a view to machines' development, the progress of mechanical engineering advancement is often directly related to the course of civilization history. Therefore, it can be studied from many perspectives. Our attention often directs to significant particular forms or stages of civilization, which arisen throughout human history. One cannot forget about ancient cultures, both Greco-Roman (in Europe) and Chinese (in Asia), which adopted to a great extent and, then, developed often anonymous technical achievements of the first civilizations of the prehistoric period [1].The illustrious ancient achievements had been followed by the technical culture of Islam, which not only systematized them but also improved a bit afterward. In the late Middle Ages, these achievements spurred European societies to search for new mechanical devices and, thus, the foundations were laid for the subsequent Renaissance. During the Renaissance and also after

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Simulation of Missiles with Grid Fins Using an Actuator Disk

Cited by 10 publications

References 12 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

Prediction of Aerodynamic Characteristics of the Grid Fins using Low/High Fidelity Methods

Potential Opportunities for Development of Mechanical Engineering with The Context of Historical Evolution of This Engineering Branch

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