Now showing items 1-10 of 15
Reduction of Unsteady Stator-Rotor Interaction by Trailing Edge Blowing Using MEMS Based Microvalves
(Virginia Tech, 1999-04-16)
This research performs an experimental study of a trailing edge blowing system that can adapt to variations in flow parameters and reduce the unsteady stator-rotor interaction at all engine operating conditions. The fan ...
Viscous solutions for the Navier Stokes equations using an upwind finite volume technique
(Virginia Tech, 1988-05-05)
The process of enhancing an upwind finite volume, two-dimensional, thin layer Navier Stokes solver to achieve complete Navier Stokes solutions is described. The shear stress and heat flux contributions are identified and ...
Effects of Mach Number and Flow Incidence on Aerodynamic Losses of Steam Turbine Blades
(Virginia Tech, 1997-04-15)
An experiment was conducted to investigate the aerodynamic losses of two high-pressure steam turbine nozzles (526A, 525B) subjected to a large range of incident angle and exit Mach number. The blades were tested in a 2D ...
The correlation of randomness with high tip losses in an axial flow fan stage
(Virginia Tech, 1991-04-19)
<p>The results of a test program incorporating a dual hot wire aspirating probe to radially survey the by-pass duct downstream of an axial flow fan stage are presented. The probe measures time resolved total temperature ...
Reduced fan noise radiation from a supersonic inlet
(Virginia Tech, 1993-04-15)
Preliminary experiment and analysis of supersonic inlet buzz
(Virginia Tech, 1996-12-05)
<p>The inlet buzz phenomenon was investigated experimentally and analytically. An external-compression axisymmetric inlet model, having 74 mm in cowl lip diameter, was tested in the 229x229 sq mm blowdown wind tunnel at ...
Turbulence measurements and noise generation in a transonic cryogenic wind tunnel
(Virginia Tech, 1989-04-15)
<p>A high-frequency combination probe was used to measure dynamic flow quality in the test section of the NASA Langley 0.3-m Transonic Cryogenic Tunnel. The probe measures fluctuating stagnation (total) temperature and ...
Reduction of Unsteady Rotor-Stator Interaction Using Trailing Edge Blowing
(Virginia Tech, 1997-01-16)
An aeroacoustic investigation was performed to assess the effects of adding mass flow at the trailing edges of four stators upstream of an aircraft engine simulator. By using trailing edge blowing to minimize the shed wakes ...
A study of the large-scale structure in a supersonic slot injected flow field
(Virginia Tech, 1988-06-15)
3-D flow calculations of a bifurcated 2D supersonic engine inlet at takeoff
(Virginia Tech, 1995-08-05)
<p>An internal, 3-D, viscous numerical flow simulation was performed on the rectangular-to-circular transition, bifurcated, 2D high speed civil transport engine inlet at takeoff. The objective of the study was to obtain ...