Design and analysis of smoke flow visualization apparatus for wind tunnel

Raval, D; Jain, Shubham; Acharii, A M; Ghosh, Kunal

doi:10.1088/1757-899x/1206/1/012014

Cited by 3 publications

(2 citation statements)

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“…To be able to compare or analyze airfoils on NACA 43018. Experiments on vortex generators have long been studied by experts, but almost every year there are new discussions about them, including: Trinder [1], Manovski, et al [2], Gurjot [3], Gao [4], Raval, et al [5], etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Using Triangular Vortex Generator Straight Arrangement in Air Naca 43018 with Smoke Generator

Rahmat¹,

Hariyadi²,

Pambudiyatno³

2023

Proceedings of the International Conference on Advance Transportation, Engineering, and Applied Science (ICATEAS 2022)

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Airplanes can fly because of the slightly curved wing shape or usually called an airfoil. The occurrence of flow separation on the part of the flow attached to the wing (boundary layer) can cause a stall. Separation of flow occurs when the angle of attack begins to increase. This can be done by adding a turbulent generator to the upper surface airfoil. A vortex generator is a type of turbulent generator that can accelerate the transition from the laminar boundary layer to the turbulent boundary layer. The method uses a tool in the form of a Wind Tunnel Open circuit. By applying smoke to the Wind Tunnel and accelerating the fan against smoke. In this experiment, the variations used are Airfoil NACA 43018, triangular type vortex generator with the straight arrangement, vortex generator distance x/c 20% from the leading edge, angle of attack (α) = 0°, 3°, 6°, 9°, 12°, and 15°, and freestream velocity speed 3 m/s. From the experimental results, this study shows that using a triangular vortex generator has been shown to improve aerodynamic performance and the performance of the NACA 43018 type airfoil. The 43018 type airfoil that uses a vortex generator compared to an airfoil that does not use a vortex generator can increase the transition from laminar flow to turbulent flow.

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Section: Introductionmentioning

confidence: 99%

Effect of Using Triangular Vortex Generator Straight Arrangement in Air Naca 43018 with Smoke Generator

Rahmat¹,

Hariyadi²,

Pambudiyatno³

2023

Proceedings of the International Conference on Advance Transportation, Engineering, and Applied Science (ICATEAS 2022)

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“…The shape of the wind tunnel resembles a venturi tube in which there is a test section, namely the NACA 43018 airfoil. While research using smoke generators has previously been carried out by Trinder [2], Manovski [3], Raval [4], Gao [5] etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Airflow Characteristics in Airfoil Naca 43018 with the Addition of Gothic Vortex Generator Using Visualization of Smoke Generator

Wahyu¹,

Hariyadi²,

Pambudiyatno³

2023

Proceedings of the International Conference on Advance Transportation, Engineering, and Applied Science (ICATEAS 2022)

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In this study, the topic studied was the characteristics of airflow passing through the gothic-type generator vortex by the smoke generator method. The purpose of this study was to visually observe the characteristics of the airflow on the upper surface passing through the NACA 43018 airfoil with varying angle of attack positions. The vortex profile of the generator x/c = 20% of the leading edge. Variations in this study are the angle of attack (α) and the placement of the generator vortex on the airfoil. The freestream speed used is a speed of 5 m/s, and at an angle of attack (α) of 0°, 3°, 6°, 9°, 12°, and 15°. From this study, it was found that the ratio of separation points between airfoils without VG compared to airfoils with VG and D = 10 mm at angles of attack (α) = 0°, 3°, 6°, 9°, 12°, and 15°had significant differences in separation points. Airfoil with VG and D = 20 mm at an angle of attack (α) = 0°, 3°, 6°, 9°, 12°, and 15°can delay separation better than D = 10 mm.

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Experimental study on flow characteristics of jet ventilation in crossflow in confined mine spaces

Wang,

Jiang,

Zhou

et al. 2024

Sci Rep

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The increasing depth of mine excavation presents greater challenges in mine ventilation and in managing cooling energy consumption. Therefore, there is an urgent need for comprehensive research on jet ventilation influenced by low-speed crossflows. This study investigated the impact of flow velocity ratios (R) and jet exit diameters (d) on flow-field distribution and flow characteristics through velocity measurements and smoke flow visualization experiments. The results of the study revealed two distinct types of air lakes formed by jet ventilation in crossflow (JVIC), with one being wall-attached and the other suspended. Notably, a significant secondary flow phenomenon was observed in the near-field near the upper wall. Additionally, the deflection angle (θj) of JVIC decreases as R and d/D increase, leading to the formation and movement of a semi-confined point (SP) and a confined point (CP) in the -x direction. Moreover, the wall confinement effect diminishes the jet’s diffusion and deflection ability in the -z direction, leading to increased penetration in the x direction. Before the formation of the SP, the deflection section of the jet lengthens, followed by a rapid shortening upon its formation. Finally, the study further developed empirical equations for the jet axial trajectory and diffusion width.

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Design and analysis of smoke flow visualization apparatus for wind tunnel

Cited by 3 publications

References 0 publications

Effect of Using Triangular Vortex Generator Straight Arrangement in Air Naca 43018 with Smoke Generator

Effect of Using Triangular Vortex Generator Straight Arrangement in Air Naca 43018 with Smoke Generator

Experimental Study of Airflow Characteristics in Airfoil Naca 43018 with the Addition of Gothic Vortex Generator Using Visualization of Smoke Generator

Experimental study on flow characteristics of jet ventilation in crossflow in confined mine spaces

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