Comparison of pitch rate history effects on dynamic stall

Presented at the NASA/AFOSR/ARO Workshop on Physics of Forced Unsteady Separation April 17-19, 1990 NASA Ames Research Center, Moffett Field, CA 9403

Interferometry and Computational Studies of an Oscillating Airfoil Compressible Dynamic Stall

Proc. of the 5th Asian Congress of Fluid Mechanics, Taejon City, Korea, Aug. 1992, Vol. II, pp. 1047 - 1050

A Quantitative Study of Unsteady Compressible Flow on an Oscillating Airfoil

(AIAA Paper 91-1683), Journal of Aircraft, Vol. 31, No. 4, Jul.- Aug. 1994, pp. 892 - 898

Compressible Dynamic Stall Control Using Dynamic Shape Adaptation

(AIAA Paper 99-0655), AIAA Journal, Vol. 39, No. 10, pp. 2021-2024, Oct. 2001.U.S. Army Research Office, Research Grant MIPR8BNP-SARO0

A Holographic Animation of Compressible Flow Interferograms

Prize Winning Entry in ﾓGallery of Fluid Motionﾔ, Physics of Fluids, Vol. 4, No. 9, Sep. 1992, pp. 1869 - 1882

Design and Development of a Dynamically Deforming Leading Edge Airfoil for Unsteady Flow Control

ICIASF '97 RECORD, IEEE Publication No. 97CH36121, pp. 132-140.A novel approach to unsteady flow separation and dynamic stall control using a dynamically deforming leading edge airfoil is described. The design details of a carbon-fiber composite skin airfoil having a thickness of 0.002 in. at the leading edge and capable of deforming at 20 Hz in unsteady flow at freestream Mach numbers of up to 0.45, are discussed. Implementation of the scheme at model scales places extraordinary demands on the design, material and fabrication of such an airfoil. Rate scaling further requires very-rapid-response instrumental ion, measurement techniques and data acquisition schemes. The special instrumentation control system developed for these experiments as well as the fluid dynamic results of successful flow control that was achieved using this method, are also discussed.U.S. Army Research Office ARO MIPR 133-94, ARO 32480.11-EGU.S. Army Research Office ARO MIPR 133-94, ARO 32480.11-E

The new ALEPH Silicon Vertex Detector

The ALEPH collaboration, in view of the importance of effective vertex detection for the Higgs boson search at LEP 2, decided to upgrade the previous vertex detector. Main changes were an increased length (±20 cm), a higher granularity for rφ view (50 µm), a new preamplifier (MX7 rad hard chip), a polymide (upilex) fan-out on z side to carry the signals from the strips to the front-end electronics outside the fiducial region reducing consequently the passive material in the central region by a factor of two. The detector, the running experience and its performance will be described

The new ALEPH Silicon Vertex Detector

The ALEPH collaboration, in view of the importance of effective vertex detection for the Higgs boson search at LEP 2, decided to upgrade the previous vertex detector. Main changes were an increased length (±20 cm), a higher granularity for rφ view (50 µm), a new preamplifier (MX7 rad hard chip), a polymide (upilex) fan-out on z side to carry the signals from the strips to the front-end electronics outside the fiducial region reducing consequently the passive material in the central region by a factor of two. The detector, the running experience and its performance will be described