High Performance Airfoil Using Co-Flow Jet Flow Control

Zha, Gecheng; Carroll, Bruce; Paxton, Craig D.; Conley, Clark A.; Wells, Adam P.

doi:10.2514/6.2005-1260

Cited by 50 publications

(70 citation statements)

References 16 publications

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“…By blowing near leading edge and suction near trailing edge on the suction surface of the airfoil, Zha's research successfully demonstrated the superior performance of co-flow jet airfoil concept. Compared with the baseline airfoil, the maximum lift increased by 113%, the angle of attack operating range increased by 100%, and the minimum drag coefficient reduced 30% at least [3,4] .…”

Section: Introductionmentioning

confidence: 94%

Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Zhou¹,

Liu²,

Zou³

et al. 2010

J. Therm. Sci.

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Separated flow can be effectively controlled through the management of blade boundary layer development. Numerical simulations on a highly-loaded, low-solidity compressor cascade indicate that combined blowing and suction flow control technique can significantly improve cascade performance, especially in increasing the cascade loading and static pressure ratio as well as decreasing the loss coefficient. Meanwhile, it is more effective to improve cascade performance by blowing near leading edge on suction surface than suction near trailing edge.Both the locations and flow rates of blowing and suction are major impact factors of this method to cascade performance. Comparing to the baseline, the static pressure ratio increases by 15% and loss coefficient decreases by 80%, with a blowing fraction of 1.7% and a suction fraction of 1.38% of the inlet mass flow.

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Section: Introductionmentioning

confidence: 94%

Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Zhou¹,

Liu²,

Zou³

et al. 2010

J. Therm. Sci.

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“…References [13][14][15][16][17][18][19][20] offer further technical insight regarding current state of the art and general problematic of the super circulation wing.…”

Section: Parameters Taken Into Considerationmentioning

confidence: 99%

Statistical Turbofan Architecture Management for Use in a Supercirculation Wing Aircraft

Drãgan¹

2012

Int. J. Turbo Jet-Engines

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The paper presents an attempt to determine weather the architecture difference between the two spool and three spool turbofan engines can have any significant effect uppon their use in super circulation wing (SCW) aircraft. Such aircraft have been experimented with since 1970's and have been revived because of growing interest in silent STOL aircraft. The approach used is statistical, i.e. actual data provided by engine manufacturers and regulating authorities such as ICAO and EASA was used to derive certain relevant parameters which were then analyzed and conclusions were formulated. Symbols: C D the momentum coefficient q D dynamic pressure T static D static SLS Thrust of the engine S D Surface area of the super circulated wing D air density D free stream velocity T Fan D fan thrust P m D fan mass flow ex D fan exhaust velocity

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“…Zha et al [14][15][16][17][18][19][20] have developed a new flow control method by implementing a co-flow jet (CFJ) on the suction surface, which has been proved an effective way to significantly increase lift, stall margin and drag reduction for stationary airfoils and enhance the performance of pitching airfoils in the aircraft research field. The working mechanism of a CFJ is different from the conventional circulation control which relies on large-radius leading edge or trailing edge to induce the Coanda effect and enhance circulation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet

Qiao

2016

Energies

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Dynamic stall control of a S809 airfoil is numerically investigated by implementing a co-flow jet (CFJ). The numerical methods of the solver are validated by comparing results with the baseline experiment as well as a NACA 6415-based CFJ experiment, showing good agreement in both static and dynamic characteristics. The CFJ airfoil with inactive jet is simulated to study the impact that the jet channel imposes upon the dynamic characteristics. It is shown that the presence of a long jet channel could cause a negative effect of decreasing lift and increasing drag, leading to fluctuating extreme loads in terms of drag and moment. The main focus of the present research is the investigation of the dynamic characteristics of the CFJ airfoil with three different jet momentum coefficients, which are compared with the baseline, giving encouraging results. Dynamic stall can be greatly suppressed, showing a very good control performance of significantly increased lift and reduced drag and moment. Analysis of the amplitude of variation in the aerodynamic coefficients indicates that the fluctuating extreme aerodynamic loads are significantly alleviated, which is conducive to structural reliability and improved life cycle. The energy consumption analysis shows that the CFJ concept is applicable and economical in controlling dynamic stall.

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High Performance Airfoil Using Co-Flow Jet Flow Control

Cited by 50 publications

References 16 publications

Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Statistical Turbofan Architecture Management for Use in a Supercirculation Wing Aircraft

Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet

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