Results 251 to 260 of about 4,147,557 (319)
Some of the next articles are maybe not open access.
Rotating detonation waves in annular gap with variable stagnation pressure
Shock Waves, 2021We consider a three-dimensional unsteady flow with one, two, or four rotating detonation waves arising in an annular gap of an axially symmetric device between two parallel planes perpendicular to its symmetry axis. The corresponding problem is formulated and studied.
V. A. Levin +2 more
openaire +2 more sources
Effect of welding variables on GTAW arc stagnation pressure
Welding in the World, 2020This paper presents the influence of welding current, electrode-workpiece distance, electrode composition, electrode diameter, electrode tip angle, shielding gas composition, and pulsed current frequency over the arc stagnation pressure of gas tungsten arc welding (GTAW).
Gabriel de Simas Asquel +2 more
openaire +2 more sources
On stagnation pressure increases in calorically perfect, ideal gases
International Journal of Heat and Fluid Flow, 2016Abstract When stagnation pressure rises in a natural or numerically simulated flow it is frequently a cause for concern, as one usually expects viscosity and turbulence to cause stagnation pressure to decrease. In fact, if stagnation pressure increases, one may suspect measurement or numerical errors. However, this need not be the case, as the laws
D.M. Williams +2 more
openaire +2 more sources
Stagnation pressure effect on Prandtl Meyer function for air
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2016When the stagnation pressure of a perfect gas increases, the specific heat and their ratio do not remain constant anymore and start to vary with this pressure. The gas does not stay perfect. Its state equation change and it becomes for a real gas. In this case, the effects of molecular size and intermolecular attraction forces intervene to correct the
Merouane Salhi +2 more
openaire +2 more sources
An empirical model for stagnation pressure gain in rotating detonation combustors
Proceedings of the Combustion Institute, 2021Abstract This work investigates the stagnation pressure gain in rotating detonation combustors (RDC) and its dependency on the geometry and mass flux of the combustor. Using a Kiel probe to directly measure stagnation pressure in the high-enthalpy exhaust stream, results are presented for a systematic variation of these parameters.
Eric Bach +3 more
openaire +2 more sources
Stagnation Pressure Changes in Unsteady Flow
Aeronautical Quarterly, 1971SummaryThe changes in stagnation pressure produced by movement of rows, arrays and sheets of vortices are derived. By applying Preston’s result for a single row of moving vortices to continuous vortex sheets, the time mean stagnation pressure downstream of a row of blades with fluctuating circulation is derived.
J. H. Horlock, H. Daneshyar
openaire +2 more sources
Recursive identification of stagnation pressure in wind tunnel system
2016 35th Chinese Control Conference (CCC), 2016Identifying an accurate model of the stagnation pressure on-line will benefit the design of the controller and improve the quality of the wind tunnel experiments. This paper focuses on the recursive identification of the stagnation pressure in the wind tunnel system.
Feng Yu, Ping Yuan, Zhizhong Mao
openaire +2 more sources
Microprocessor control of high-speed wind tunnel stagnation pressure
15th Aerodynamic Testing Conference, 1988The development and implementation of a control algorithm for the microprocessor-based stagnation pressure control system of the Penn State Supersonic Wind Tunnel Facility is reported. The gas dynamics and the controlvalve characteristics of this blowdown-type facility are nonlinearly related. A mathematical model was developed for the open-loop system
Y.-T. FUNG, G. SETTLES, A. RAY
openaire +2 more sources
Accuracy in Computational Aerodynamics Part 1: Stagnation Pressure
SAE Technical Paper Series, 1998<div class="htmlview paragraph">For the computation of the flow around a car there is typically an overprediction of stagnation and base pressure coefficient by 0.02 and 0.07 respectively causing an underprediction of total drag by about 0.01 - 0.02.</div> <div class="htmlview paragraph">To determine the cause of the error in ...
Niklas Axelsson +2 more
openaire +2 more sources
Stagnation pressure effect on the supersonic minimum length nozzle design
The Aeronautical Journal, 2019ABSTRACTThe aim of this work is to develop a calculation model based on the method of characteristics making it possible to study the effect of the stagnation pressure of the combustion chamber on the 2D and axisymmetric minimum length nozzle design giving a uniform and parallel flow at the exit section.
T. Zebbiche
openaire +2 more sources