Results 211 to 220 of about 3,988 (248)
Some of the next articles are maybe not open access.
Tip Gap Variation on a Transonic Rotor in the Presence of Tip Blowing
Volume 2A: Turbomachinery, 2014High stability and efficiency are the main two objectives in the design of an axial-flow compressor. Stability usually reduces at higher stage loading, and the stability margin critically drops in transient operation and through the life cycle of an engine. A major reason for this to happen is the growing tip gap.
Cyril Guinet +3 more
openaire +1 more source
Development of a Trailing Vortex Formed With Spanwise Tip Blowing
Volume 1: Symposia, Parts A and B, 2005Trailing vortices were formed with strong core jets and high turbulence levels in a wind tunnel using a NACA 0015 rectangular semi-span wing having a full span aspect ratio of 5 and a chord Reynolds number of 105. The jet on the vortex core was generated by air blown from the wing tip through small holes arranged along the periphery of the wing cross ...
S. Richardson +2 more
openaire +1 more source
Comparison of Measurements and Predictions for Blowing from a Turbine Blade Tip
Journal of Propulsion and Power, 2005The clearance gap between the tip of a turbine blade and the shroud has an inherent leakage flow from the pressure side to the suction side of the blade. This leakage flow of combustion gas and air mixtures leads to severe heat-transfer rates to the blade tip of the high-pressure turbine.
E. Couch +4 more
openaire +1 more source
Doppler global velocimetry measurements in a wing flow field with tip blowing
, 2019 A two-component Doppler global velocimetry (DGV) system has been developed, improved, and tested. DGV is a non-intrusive optical velocity measurement technique. DGV measures the Doppler shift of the frequency of the light scattered by seed particles at a
Starn, Andrew Douglas
openaire +3 more sources
Numerical simulation of wing lift augmentation with spanwise tip blowing
26th Aerospace Sciences Meeting, 1988Navier-Stokes simulations are used to study the phenomena of wing lift augmentation with spanwise tip blowing. Flowfields calculated for varying blowing conditions are analyzed to determine the mechanisms responsible for providing lift augmentation. It is found that both viscous and inviscid effects are important.
S. CARUSO, M. MENDENHALL, R. CHILDS
openaire +1 more source
Numerical Simulation of the Effects of Spanwise Blowing on Wing-Tip Vortex Formation and Evolution
23rd AIAA Applied Aerodynamics Conference, 2005A high resolution computational methodology is developed for the solution of the compressible Reynolds-averaged Navier-Stokes equations. This methodology is used to study the effect of spanwise blowing as a method of tip vortex control. The numerical error is reduced by using high order accurate schemes on appropriately refined meshes.
Karthikeyan Duraisamy, James D. Baeder
openaire +1 more source
Fine structure of the tip of chemosensitive hairs in two blow flies and the stable fly
Experientia, 1967Licht- und elektronenmikroskopische Studien der chemorezeptiven Spitze von Geschmackshaaren wurden bei den FliegenPhormia regina, Calliphora vicina undStomoxys calcitrans durchgefuhrt. Die Geschmackshaare dieser Fliegen ahneln sich strukturell bis auf einen ausgepragten Offnungs- und Schliessmechanismus, der fur die Geschmackshaare vonStomoxys ...
B, Stürckow, P E, Holbert, J R, Adams
openaire +2 more sources
Measured Adiabatic Effectiveness and Heat Transfer for Blowing From the Tip of a Turbine Blade
Journal of Turbomachinery, 2004Abstract The clearance gap between the tip of a turbine blade and the shroud has an inherent leakage flow from the pressure side to the suction side of the blade. This leakage flow of combustion gas and air mixtures leads to severe heat transfer rates on the blade tip of the high-pressure turbine.
J. Christophel +3 more
openaire +1 more source
Difference in the Working Principle of Axial Slot and Tip Blowing Casing Treatments
Volume 2A: Turbomachinery, 2016Tip blowing and axial slot casing treatments have shown their ability to enhance the stability of a transonic axial compressor with different effects on efficiency. For an effective application of these casing treatments, a good knowledge of the influence of the casing treatment on the rotor flow field is important.
André Inzenhofer +5 more
openaire +1 more source
Near field study of vortex attenuation using wing-tip blowing
The Aeronautical Journal, 2002The trailing vortex wake shed by large transport aircraft not only has detrimental effects on their aerodynamic efficiency through the production of induced drag but can cause a considerable safety hazard to smaller following aircraft. This hazard is a major factor in determining the minimum allowable spacing between aircraft during airport operations ...
R. G. Simpson, N. A. Ahmed, R. D. Archer
openaire +1 more source