Three-dimensional suction flow control and suction jet length optimization of NACA 0012 wing

Yousefi, Kianoosh; Saleh, Reza

doi:10.1007/s11012-015-0100-9

Cited by 59 publications

(39 citation statements)

References 26 publications

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“…It has also been documented by ight tests that leading edge suction helps in delaying transition and is a very e ective means of increasing maximum lift, it has a similar e ect to that of a leading edge slat [9,22]. Kianoosh and Reza [24] observed that when the suction slot is placed near the leading edge at 10% of the chord there is a negligible a ect below stall angle (14 degrees). But had a phenomenal impact on the L/D ratio beyond the stall angle.…”

Section: Impact Of Suction Hole Positionmentioning

confidence: 87%

Understanding boundary layer suction and its e ect on wings - A review

Kulkarni¹,

Rohit

Lokanatha³

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Boundary layer suction reduces drag by stabilizing the laminar boundary preventing transition and conceding higher regions of laminar ow. Boundary layer suction(BLS) also postpones boundary layer separation resulting in higher CLmax. This phenomenon is particularly useful in the Aerospace sector and many applications are found and hence understanding the mechanics of BLS becomes critical. Consequently it becomes vital to understand the e ect of BLS during di erent ight regimes and mission pro les. The objective of this review is to understand and document the understanding on BLS and its e ects. The in uence of location and position of suction, suction ow rate and suction hole width on aerodynamic performance by experiments and numerical analysis have been reviewed. It has been brought out that there is a convincing decrease in drag and pressure loss and an increase in max lift which in turn improves the overall performance of the aircraft. While multi-hole suction control can reduce drag much more e ciently than single hole suction control, position of the suction hole has a greater e ect on reducing pressure losses than the suction ow rate. The factors a ecting BLS and its e ects on aerodynamic performance and overall performance of the aircraft has been discussed in this review.

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Section: Impact Of Suction Hole Positionmentioning

confidence: 87%

Understanding boundary layer suction and its e ect on wings - A review

Kulkarni¹,

Rohit

Lokanatha³

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The blowing at the trailing edge, however, can enhance the lift, particularly by using smaller oscillation range. Hence, perpendicular suction at the leading edge and tangential blowing at the trailing edge are the best locations for suction and blowing jet slots [17,[24][25].…”

Section: Closing Remarksmentioning

confidence: 99%

“…Yousefi and Saleh [24] conducted a three-dimensional suction flow control study to investigate the aerodynamic characteristics of a wing with a NACA 0012 airfoil section. Two different suction slot distributions were considered at the leading edge of the wing, center suction and tip suction.…”

Section: Recent Contributionsmentioning

confidence: 99%

“…It was concluded that the tip suction is more efficient when the jet length is less than half the wingspan, and consistently, the center suction provides better aerodynamic performance when the jet length is greater than half the wingspan. The effects of center suction and tip suction on the streamlines behind the wing are shown in figures 3 and 4 [24], respectively. In another study, Yousefi et al [25] and Yousefi and Saleh [17] investigated the effects of suction and blowing jet width on the aerodynamic characteristics of a NACA 0012 airfoil.…”

Section: Recent Contributionsmentioning

confidence: 99%

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On the Active and Passive Flow Separation Control Techniques over Airfoils

Moghaddam

Neishabouri

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In the present work, recent advances in the field of the active and passive flow separation control, particularly blowing and suction flow control techniques, applied on the common airfoils are briefly reviewed. This broad research area has remained the point of interest for many years as it is applicable to various applications. The suction and blowing flow control methods, among other methods, are more technically feasible and market ready techniques. It is well established that the uniform and/or oscillatory blowing and suction flow control mechanisms significantly improve the lift-to-drag ratio, and further, postpone the boundary layer separation as well as the stall. The oscillatory blowing and suction flow control, however, is more efficient compared to the uniform one. A wide range of parameters is involved in controlling the behavior of a blowing and/or suction flow control, including the location, length, and angle of the jet slots. The oscillation range of the jet slot is another substantial parameter.

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“…This type of technique is cheaper and simple and doesn't contribute to additional costs. The active flow control techniques require some amount of power to manipulate the flow, such as the power to run vortex generators, steady suction or blowing, etc, Yousefi and Saleh [157]. Such techniques tend to increase efficiency for the part and over-load operations but maintenance and upfront costs increase making it economically feasible for large scale applications, MacPhee and Beyene [158].…”

Section: Flow Separation Techniques For Wind Turbine's Efficiency Enhmentioning

confidence: 99%

Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review

et al. 2018

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Among renewable sources of energy, wind is the most widely used resource due to its commercial acceptance, low cost and ease of operation and maintenance, relatively much less time for its realization from concept till operation, creation of new jobs, and least adverse effect on the environment. The fast technological development in the wind industry and availability of multi megawatt sized horizontal axis wind turbines has further led the promotion of wind power utilization globally. It is a well-known fact that the wind speed increases with height and hence the energy output. However, one cannot go above a certain height due to structural and other issues. Hence other attempts need to be made to increase the efficiency of the wind turbines, maintaining the hub heights to acceptable and controllable limits. The efficiency of the wind turbines or the energy output can be increased by reducing the cut-in-speed and/or the rated-speed by modifying and redesigning the blades. The problem is tackled by identifying the optimization parameters such as annual energy yield, power coefficient, energy cost, blade mass, and blade design constraints such as physical, geometric, and aerodynamic. The present paper provides an overview of the commonly used models, techniques, tools and experimental approaches applied to increase the efficiency of the wind turbines. In the present review work, particular emphasis is made on approaches used to design wind turbine blades both experimental and numerical, methodologies used to study the performance of wind turbines both experimentally and analytically, active and passive techniques used to enhance the power output from wind turbines, reduction in cut-in-speed for improved wind turbine performance, and lastly the research and development work related to new and efficient materials for the wind turbines.

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Three-dimensional suction flow control and suction jet length optimization of NACA 0012 wing

Cited by 59 publications

References 26 publications

Understanding boundary layer suction and its e ect on wings - A review

Understanding boundary layer suction and its e ect on wings - A review

On the Active and Passive Flow Separation Control Techniques over Airfoils

Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review

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