High-performance airfoil using coflow jet flow control

Ge Cheng Zha, Bruce F. Carroll, Craig D. Paxton, Clark A. Conley, Adam Wells

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

The high performance of the coflow jet (CFJ) airfoil, using an injection jet slot near the leading edge (LE) and a suction slot near the trailing edge (TE), with the wind tunnel test results is demonstrated. The baseline airfoil NACA0025 and the CFJ airfoil CFJ0025-065-196 airfoil has the injection slot height of 0.65% of the chord and the suction slot height of 1.96% of the chord. The results show that the lowest injection total pressure coefficient of the CFJ airfoil of 1.04 has the momentum coefficient varying from 0.05 to 0.1, which increases the angle of attack (AOA) stall margin by 100%. The CFJ airfoil requires that the injection mass flow rate be equal to the suction mass flow rate to achieve the zero mass-flux flow control. The results also show that the mixing shear layer loses stability due to the large difference of the Mach number and the high momentum of the injection jet creates a large centrifugal force, which makes the jet detached and the flowfield collapse.

Original languageEnglish (US)
Pages (from-to)2087-2090
Number of pages4
JournalAIAA journal
Volume45
Issue number8
DOIs
StatePublished - Aug 2007

ASJC Scopus subject areas

  • Aerospace Engineering

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