Results 201 to 210 of about 3,988 (248)

Lift modulation with lateral wing-tip blowing

Journal of Aircraft, 1988
The utilization of a thin jet of air exiting in the spanwise direction from a slot at each of the tips of a straight wing has been investigated as a means of generating weak lift modulation. A theory showing the analytical relationship between blowing intensity and aerodynamic forces was developed and its results were compared against experiments.
N J Wood
exaly   +2 more sources

Vortex Topology of Wing Tip Blowing

45th AIAA Aerospace Sciences Meeting and Exhibit, 2007
An extensive parametric study was conducted to examine the effect of continuous blowing from high aspect ratio jets on the tip vortex in the near wake. It was found that the high aspect ratio jet produces a pair of counter-rotating vortices of unequal strength; their interaction with the tip vortex leads to single or multiple-vortex wakes.
Ismet Gursul
exaly   +2 more sources

Flow structure and scaling laws in lateral wing-tip blowing

AIAA Journal, 1989
When a thin jet sheet exits from the tip of a straight wing in the spanwise direction, the wing experiences a lift augmentation. In many cases, lateral blowing causes a lateral displacement of the tip vortices, without complicating the vortex structure.
D Tavella, N J Wood
exaly   +2 more sources

Nasal blowing induces subcutaneous emphysema post penetrating mastoid tip trauma

International Journal of Pediatric Otorhinolaryngology, 2019
We describe the case of a child with an isolated penetrating trauma to the mastoid tip. Nasal blowing consequently induced air bubbles coming through the mastoid cutaneous fistula and causing extensive subcutaneous neck emphysema. A computed tomography (CT) demonstrated a right mastoid tip bone fracture with extensive cervical subcutaneous emphysema ...
Yehuda Schwarz, Ala'A Hamdan, Pierre Attal   +2 more
exaly   +3 more sources

Effect of Steady Blowing on Wing Tip Flowfield

2nd AIAA Flow Control Conference, 2004
An experimental investigation was conducted to study the effect of steady blowing near the wing tip, as a means of control of the trailing vortex. Velocity measurements were taken, using a PIV system, around the tip and in the near wake of a rectangular wing, which was equipped with several blowing slots.
Ismet Gursul
exaly   +2 more sources

Parametric Study of the Bleed Position in a Tip Blowing Casing Treatment

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014
Stability issues are often restricting the design space of axial-flow compressors. Casing treatments have shown the ability to enhance stability on existing designs in a late design phase. Prior studies have identified the positioning of the casing treatment as an important parameter for both stability and overall efficiency.
Cyril Guinet, Valentin Bettrich, Volker Gümmer   +2 more
exaly   +2 more sources

Effect of ejection angle and blowing ratio on heat transfer and film cooling effect on a winglet tip

International Journal of Heat and Mass Transfer, 2018
Abstract Effects of ejection angle and blowing ratio on heat transfer and film cooling effect on a winglet tip were numerically investigated with the RANS (Reynolds Averaged Navier-Stokes) equations solutions. The total pressure loss in cascade, and heat transfer coefficient and film cooling effectiveness on the winglet tip with both tip and pressure
Xin Yan
exaly   +2 more sources

Effects of blowing ratio and film hole arrangement on cavity blade tip cooling

Physics of Fluids
Blade tip leakage is responsible for reducing the aerodynamic performance and increasing the thermal load. In order to obtain better cooling efficiency, the thermodynamic performance of different film hole arrangements and blowing ratios have been compared and analyzed in a cavity tip structure.
Yingjie Chen, Le Cai, Zhengshuai Du
exaly   +2 more sources

Influence of a Tip Blowing Casing Treatment on the Stator Flow

51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015
Andreas Hupfer
exaly   +2 more sources

Influencing Parameters of Tip Blowing Interacting With Rotor Tip Flow

Journal of Turbomachinery, 2015
The design space of axial-flow compressors is restricted by stability issues. Different axial-type casing treatments (CTs) have shown their ability to enhance compressor stability and to influence efficiency. Casing treatments have proven to be effective, but there still is need for more detailed investigations and gain of understanding for the ...
Cyril Guinet, André Inzenhofer, Volker Gümmer   +2 more
openaire   +1 more source