Comparison of the Wrap-Around Fins and the Planar Fins in Aerodynamic Parameter

Liu, Xiao; Tang, Sheng Jing; Guo, Jie

doi:10.4028/www.scientific.net/amm.444-445.347

Cited by 5 publications

(8 citation statements)

References 6 publications

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“…This is further investigated in various literature. 8 10–12,14,15 . However, it is observed that, by positioning the fins in an opposite arrangement, identical pressure distributions develop on either sides of the fin, ending up with the elimination of the rolling moment, so that the objective of the present research (elimination of rolling moment) is achieved.…”

Section: Resultsmentioning

confidence: 99%

“…Leo et al. 11 compared WAFs against flat fins. Their investigations demonstrated that the two fins differ in resulted rolling angles only, with other aerodynamic properties being mostly the same.…”

Section: Introductionmentioning

confidence: 99%

“…They also showed that, the presence of rolling moment at zero angle of attack is a result of unequal pressures on either sides of the fins. Leo et al 11 compared WAFs against flat fins. Their investigations demonstrated that the two fins differ in resulted rolling angles only, with other aerodynamic properties being mostly the same.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of aerodynamic effects of opposite wrap-around fins at supersonic speeds

Bagheri

Pasandideh‐Fard

Sabour³

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this research work, using numerical simulations, the three-dimensional flow around a standard projectile is investigated with two fin arrangement models, namely opposite and conventional wrap-around fins. Eliminating the rolling moment and investigation of aerodynamic performance of the new geometries are the purpose of this paper. Finite volume method is used to undertake the numerical simulations where flow is considered to be compressible, steady, nonviscous, and three-dimensional. For this purpose, the research begins with simulating the flow around a projectile with conventional fin arrangement and then the obtained values of drag coefficients and rolling moment are compared against experimental data, indicating the validity of the simulation results. After then, the effect of wrap-around fins in an opposite arrangement is investigated, with the results compared against those of the conventional configuration. The opposite fins are investigated at different opening angles and joint position, while the area of fins shading is assumed constant in all cases. Simulations were conducted at three Mach numbers of 1.5, 2.5, and 3.5, different angles of attack ranging within 0–14°, and lateral wind angles up to 8°. According to the results, the rolling moment in conventional wrap-around fins is a result of the pressure difference between sides of the fins, so that it can be avoided by configuring the fins in an opposite arrangement, which contributes to slightly higher drag coefficients too. Fin dimensions and their opening angle influence the regime of the flow passing through the fins, making their aerodynamic performance variable at different Mach numbers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical investigation of aerodynamic effects of opposite wrap-around fins at supersonic speeds

Bagheri

Pasandideh‐Fard

Sabour³

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Zhang, Ji, Xu, and Schlüte (2015) used a Spalart-Allmaras turbulence model to compare the aerodynamic characteristics between planar and wraparound fins by varying geometric parameters at supersonic speeds. Liu, Tang, and Guo (2013) performed simulations on the planar and wrap-around fin missiles and compared the basic aerodynamic characteristics between the two. Tanrõkulu, Onen, and Gokhan (2000) compared non-linear dynamic aerodynamic characteristics of a basic planar and wrap-around fin missile.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Flow field in the proximity of A Single Planar & Wrap-around Fin

Sharma¹,

Saini²,

Chaudhary³

et al. 2019

IJAAA

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“…These tests suggested that CFD could effectively help in understanding the aerodynamics and basic fluid flow pattern. The planar fins are basic fins and have been often used as a benchmark for comparison with unconventional fins [5][6][7][8][9][10]. Due to their geometric symmetry they often show negligible rolling moments.…”

Section: Introductionmentioning

confidence: 99%

Investigation of flow-field around a single generic planar fin using CFD

Sharma

Kumar

2019

SN Appl. Sci.

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The purpose of this paper is to initiate a 3-D non-spinning semi-circular missile model with a single generic planar fin and perform a computational analysis on it to understand the flow pattern around the fin. A freestream computational fluid dynamics analysis was done in the subsonic and supersonic Mach range, in which, the fluid behaviour was investigated using a two-equation turbulence model. A structured mesh was adopted to visualize the flow pattern around the fin. The aerodynamic coefficients were calculated for the model, and the predicted values were compared with the previous experimental results as well as the numerical results. This paper attempts to present all the possible flow visualizations which might help in better understanding of flow around missiles having planar fins. This work also attempts to establish a turbulent computational model for a single planar fin missile model for subsonic to supersonic range.

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Comparison of the Wrap-Around Fins and the Planar Fins in Aerodynamic Parameter

Cited by 5 publications

References 6 publications

Numerical investigation of aerodynamic effects of opposite wrap-around fins at supersonic speeds

Numerical investigation of aerodynamic effects of opposite wrap-around fins at supersonic speeds

Comparison of Flow field in the proximity of A Single Planar & Wrap-around Fin

Investigation of flow-field around a single generic planar fin using CFD

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