Aerodynamic performance enhancement of co-flow jet airfoil with simple high-lift device

Zhi, Haolin; Zhu, Zhenhao; Lu, Yujin; Deng, Shuanghou; Xiao, Tianhang

doi:10.1016/j.cja.2021.01.011

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…Nowadays the researches on CFJ technique used as the measures for the enhancement of lift and rudder effect are relatively rare, except that Shi et al [3] applied CFJ technique in the vertical tail to increase the rudder efficiency and Zhi et al [4] used CFJ technique for the airfoil with a trailing-edge rudder to increase the airfoil lift. Considering that the requirement of lift coefficient for taking off and landing in the plateau environment can not be fulfilled solely by the regular lift-enhancement device, it is necessary to investigate the application situation of the active flow control techniques (such as CFJ technique) in the transport airplane and analyze their effect laws on the lift characteristics of the transport.…”

Section: Introductionmentioning

confidence: 99%

The effects of geometry parameters on the aerodynamic performance of CFJ airfoil used by a STOL transport

Chen

Xie²,

He³

et al. 2023

J. Phys.: Conf. Ser.

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With the purpose of investigating the effects of geometry parameters of CFJ (Coflow jet) device on the aerodynamic characteristics of the supercritical bacj airfoil used by a STOL transport, we have carried out a computational analysis of CFJ airfoil with different values of injection slot size and location under the low-speed condition. The results show that the lift coefficient decreases gradually with decreasing stall angle, when the injection slot size is increased. When α=8°, with increasing injection slot size, the velocity of blowing jet decreases with decreasing power consumption and increasing aerodynamic effectiveness. Further, with the injection slot shifted towards the downstream direction, the α value corresponding to the maximum effective lift-drag-ratio increases with increasing maximum lift coefficient.

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Section: Introductionmentioning

confidence: 99%

The effects of geometry parameters on the aerodynamic performance of CFJ airfoil used by a STOL transport

Chen

Xie²,

He³

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…From a computational perspective, methodologies such as RANS [25], DES [26], and IDDES [27] have been instrumental in dissecting the aerodynamic characteristics of the CFJ across varying angles of attack and Mach numbers. Investigations into wall separation, co-flow jet controls [28], and applications of CFJ across rotor blades [29], boosters [30], flaps [31], wind airfoils [32], dynamic stall phenomena [33], and integrated wing-body vehicles have further broadened the technology's horizon.…”

Section: Introductionmentioning

confidence: 99%

Experimental design for a novel co-flow jet airfoil

Jiang,

Yao,

2023

Adv. Aerodyn.

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The Co-flow Jet (CFJ) technology holds significant promise for enhancing aerodynamic efficiency and furthering decarbonization in the evolving landscape of air transportation. The aim of this study is to empirically validate an optimized CFJ airfoil through low-speed wind tunnel experiments. The CFJ airfoil is structured in a tri-sectional design, consisting of one experimental segment and two stationary segments. A support rod penetrates the airfoil, fulfilling dual roles: it not only maintains the structural integrity of the overall model but also enables the direct measurement of aerodynamic forces on the test section of the CFJ airfoil within a two-dimensional wind tunnel. In parallel, the stationary segments are designed to effectively minimize the interference from the lateral tunnel walls. The experimental results are compared with numerical simulations, specifically focusing on aerodynamic parameters and flow field distribution. The findings reveal that the experimental framework employed is highly effective in characterizing the aerodynamic behavior of the CFJ airfoil, showing strong agreement with the simulation data.

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“…The injection system is used in order to accelerate the flow on the suction side of the wing, thus delaying the separation phenomena. Studies showed that a 30% increase in wing efficiency is possible when combined with a suction process on the suction side downstream of the injection sections [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Application of a Performance-Improvement Method for Small-Size Axial Flow Turbines

Nicoara,

Crunteanu,

Vilag

2023

Aerospace

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As a main component of most gas-turbine engines, the axial flow turbines have been in a process of continuous improvement, reaching high efficiencies and reliability. A well-known drawback of these systems is the rapid decrease in performance when operating at lower than nominal conditions. Thus, a novel performance-enhancement method for axial turbines operating at partial loads has been previously proposed and numerically characterized. In this paper, one applies the aforementioned method for a smaller size axial flow turbine, part of a gas-generator assembly for a microjet engine, to determine, by the use of CFD analysis, the influence of the system at different partial regimes across the working line. A logical scheme based on iterative steps and multiple numerical simulations is also used to determine the engine response to the injection of compressor bleed air into the turbine passages. The results show, as determined in the previous study, that the generated power can be increased for all partial regimes, with the influence being more noticeable at higher regimes, leading to a reduction in fuel consumption in order to achieve the same regimes.

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Aerodynamic performance enhancement of co-flow jet airfoil with simple high-lift device

Cited by 14 publications

References 17 publications

The effects of geometry parameters on the aerodynamic performance of CFJ airfoil used by a STOL transport

The effects of geometry parameters on the aerodynamic performance of CFJ airfoil used by a STOL transport

Experimental design for a novel co-flow jet airfoil

Application of a Performance-Improvement Method for Small-Size Axial Flow Turbines

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