Effect of temperature on the aerodynamics of airfoil in low Reynolds number flow

Kumar, Akash Vineet Mahesh; Rajendrakumar, Niveditha; Gogineni, Purna Chaitanya; Gopan, Nandu; Thangeswaran, Rajesh Senthil Kumar

doi:10.1063/1.5120197

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…The reduction in C d compared to unheated case for the L0, L1, U0, and U1 cases were 2.1%, 0.95%, 0.77%, and 0.26%, respectively. Similar to results presented in the literature, the best heat patch location for drag reduction was close to the leading edge on the pressure side [23,66].…”

Section: Heat Patches On a Two-dimensional Airfoilsupporting

confidence: 86%

Aerodynamic Effects of a Wing Surface Heat Exchanger

et al. 2023

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One challenge for the design and analysis of hybrid electric aircraft configurations is an increased demand in the rejection of excess waste heat. A wing surface heat exchanger concept, which is explored as part of the IMOTHEP project, foresees transferring heat from the propulsive electrical components to the wing surface of the aircraft. Here, heat is mainly dissipated and transported by forced convection. The present study focuses on the analysis of the impact of heat rejection via the wing surface on the wing’s heat transfer and aerodynamic efficiency characteristics. For this purpose, RANS CFD studies of 2D airfoils and a 3D wing propeller geometry of a regional turboprop configuration in representative flight conditions (take off, cruise, and taxi in) are carried out. For each condition, the influence of defining parameters, such as altitude, freestream velocity, angle of attack, surface temperature, and propeller thrust is explored. It is shown that, when increasing the wing surface temperature compared against the freestream temperature, the aerodynamic efficiency of the wing deteriorates for all flight conditions. In reference cruise conditions for example, the lift-to-drag ratio decreases by 4%, while the average heat transfer coefficient is reduced by almost 20% when increasing the surface temperature by 300 K. Furthermore, the propeller slipstream enhances the wing’s heat transfer capacity significantly.

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Section: Heat Patches On a Two-dimensional Airfoilsupporting

confidence: 86%

Aerodynamic Effects of a Wing Surface Heat Exchanger

et al. 2023

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“…The numerical investigation was carried out to analyse the surface heating over a NACA 0012 airfoil at Re = 2.5 × 10 5 using the transition SST turbulent model. It was suggested that the heating of the lower nose of the airfoil with a constant heat source and consistently extended AOA (0° to 6°) could exhibit a significant reduction in the drag (Kumar et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on heatwave effect over an airfoil for unmanned aerial vehicle applications

Somashekar

2022

AEAT

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Purpose The heatwave effects over an airfoil have a greater influence in the aerodynamic efficiency. The purpose of this study is to investigate the effects of heatwave upon the low Reynolds number airfoil aerodynamic performance. Design/methodology/approach In this research, the heatwave effects on micro-aerial vehicles’ wing operation are also demonstrated both numerically and experimentally, at the Chord-based Reynolds number Rec = 2 × 105, and under the influence of various environmental temperatures, i.e. 27ºC (room temperature), 40ºC and 50ºC for various flying conditions. A numerical investigation of the low Reynolds number flows with the thermal effect around the unmanned aerial vehicle is presented using the k–ɛ turbulent model. Besides that, the low Reynolds number-based wind tunnel experimental setup is developed to determine the effects of a heatwave over an airfoil. Then, the numerical simulations and wind tunnel experiments are conducted. Findings The numerical and wind tunnel’s experimental investigations have been performed on a 2D airfoil under a heatwave environment, i.e. 27ºC, 40ºC and 50ºC for different flight conditions. The numerical and experimental results revealed that the heatwave effect and aerodynamic performance are validated with experimental results. The lift and drag coefficients for both numerical and experimental results show very good correlation at Reynolds number 2 × 105. Practical implications The consequences of the increasing temperatures to varying degrees will also be experienced by all commercial aircraft. That is why some great findings are presented here, which are highly relevant for the current and future airline operations. However, sooner than later, the aviation industry should also begin to consider the rising effects of temperature on aircraft operations to develop the loss-reducing adaptable plans. Originality/value From the numerical and wind tunnel experimental results, the recorded maximum lift coefficients are observed to be 2.42, 2.39 and 2.36 for 27ºC (room temperature), 40ºC and 50ºC, respectively, at 16° angle of attack, numerically. Similarly, the recorded maximum lift coefficients are observed to be 2.410, 2.382 and 2.354 for 27ºC (room temperature), 40ºC and 50ºC, respectively, at 16° angle of attack, experimentally. The heatwave effects over an airfoil have a greater influence in the aerodynamic efficiency.

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Numerical investigation of the effect of trailing edge jets on flaps at high angles of deflection

Sunny,

Anupindi

2024

Sādhanā

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Effect of temperature on the aerodynamics of airfoil in low Reynolds number flow

Cited by 5 publications

References 3 publications

Aerodynamic Effects of a Wing Surface Heat Exchanger

Aerodynamic Effects of a Wing Surface Heat Exchanger

Experimental and numerical study on heatwave effect over an airfoil for unmanned aerial vehicle applications

Numerical investigation of the effect of trailing edge jets on flaps at high angles of deflection

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