A convex corner models the upper surface of a deflected flap and shock-induced boundary layer separation occurs at transonic speeds. This study uses micro-vortex generators (MVGs) for flow control. An array MVGs (counter-rotating vane type, ramp type co-rotating type) with height 20% thickness incoming is installed upstream corner. The pressure distributions are similar regardless presence MVGs...

The benchmark active controls technology and wind tunnel test program at NASA Langley Research Center was started with the objective to investigate the nonlinear, unsteady aerodynamics and active flutter suppression of wings in transonic flow. The paper will present the flutter suppression control law design process, numerical nonlinear simulation and wind tunnel test results for the NACA 0012 ...

How to determine accurately and efficiently the aerodynamic forces of aircraft in high-speed flow is one great challenges modern aerodynamics. In this Letter we propose a new similarity law for steady transonic-supersonic over thin bodies. The based on local Mach number frozen principle. It depends both specific heat ratio free-stream number. enables lift drag coefficients from that reference s...

BACKGROUND Intra-operative flow measurement during coronary or peripheral bypass operations is helpful for ruling out technical failures and for prediction of complication and patency rates. Preclinical validation of the flowmeters is required in order to rely on the intra-operatively measured results. The aim of this study is to evaluate a new "dual beam Doppler" blood flowmeter before clinica...

Measurement of blood flow rate (Qa) is used to monitor arteriovenous fistulas and grafts that are used for hemodialysis blood access. Most Qa measurements use indicator dilution techniques to measure the recirculation that is induced by the reversal of hemodialysis blood lines. R plus the dialysis circuit flow (Qb) allows the calculation of Qa. The principle of needle reversal also can be used ...

The article describes development of a high order finite volume method for solution of transonic flow problems. The method is based on a reconstruction procedure similar to weighted ENO. Our reconstruction procedure is based on least square method with data dependent weights which is much simpler to implement than ENO scheme. The computational results demonstrate the usability of this approach ...

Direct numerical simulations are used to investigate the effect of Mach number on the unsteady flow of an open cavity. The implicit solution is obtained for the compressible Navier-Stokes Equations using compact sixth-order spatial differencing coupled with tenth-order implicit filters. Results for transonic and subsonic flow over a two dimensional cavity are presented for the sound pressure le...