Numerical Study of Aerodynamic Characteristics of a Pointed Plate of Variable Elongation in Subsonic and Supersonic Gas Flow

Abstract

This study shows a thick plate, pointed on both sides, of variable elongation under action of subsonic and supersonic air flows. The relevance of the work is driven by the development of new aircraft that change their geometry during the flight, in particular, aircraft that change the relative elongation during the flight. The aim of this work is to determine the aerodynamic fields around the pointed plate, taking into account its variable elongation, and to determine the effect of variable elongation on the drag coefficient of the plate. Numerical simulation was used as a research tool. Mathematical modeling is based on Reynolds-averaged Navier-Stokes equations. The original software was used for the analysis; the computational algorithm is based on the finite volume method. The mathematical model and algorithm of numerical computation of subsonic and supersonic air flow acting on a pointed plate are presented. A pattern of gas flow acting on the plate is obtained at zero angle of attack for Mach numbers from 0,6 to 4. The dependence of the plate drag coefficient on Mach number and relative elongation is obtained. It is established that for a thick pointed plate the drag coefficient significantly depends on the elongation for both sound and supersonic flow. As a result of numerical experiments, the anomalous behavior of the drag coefficient in the transonic area at large elongations was found. It is shown that the decrease in elongation leads to an increase in the drag coefficient of the plate, which affects the aerodynamic characteristics of the aircraft of variable elongation.

Aerodynamic Characteristics of Blerak Winglet

“…The aerodynamic properties of the aircraft with variable elongation are impacted by the drag coefficient of the plate increasing as elongation decreases. For Mach values between 0.06 and 4 [22]. The various types of winglets are used in commercial aircraft is shown in Figure 1.…”

Heat Transfer Study in Cylindrical Cavity with Heat Absorption or Generation

“…During the past few decades, numerous methods have been proposed to solve the RTE in the axisymmetric and cylindrical geometry. Among others, the Monte Carlo method (MCM) [1], the discrete transfer method (DTM) [2,3], the discrete ordinates method (DOM) [4], the finite-volume method (FVM) [5][6][7][8][9][10], the collapsed dimension method (CDM) [3], and the control volume finite element method (CVFEM) [11][12][13][14][15][16][17][18][19][20][21][22][23]. Analyses of coupled conduction-radiation heat transfer in cylindrical media have also been reported by many researchers [24][25][26].…”

Numerical Investigation of the Hypersonic Inlet under Throttling with Heat Source

“…Numerous studies have looked at the aerodynamics of subsonic, supersonic, and hypersonic flow employing numerical modelling [16][17][18][19]. Several computational studies dealing with hypersonic intake flow management revealed that the development of turbulence was a result of the interaction of the low-density zone and the bow shock, resulting in a change in the drag coefficient and flow detachment in the high-speed flow.…”