Results 251 to 260 of about 2,517,351 (286)
Some of the next articles are maybe not open access.
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 +1 more source
A Stagnation Pressure Probe for Supersonic and Subsonic Flows
Aeronautical Quarterly, 1974SummaryThe usefulness of a probe which can sense the absolute value of the stagnation pressure in supersonic flow has long been recognised. In the past such a probe has not been available and therefore it has been necessary to infer this fundamentally important flow property from measurements of other properties.
openaire +1 more source
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 +1 more source
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 +1 more source
Randomised, controlled pilot to compare collagen and foam in stagnating pressure ulcers
Journal of Wound Care, 2012Objective: To compare the clinical efficacy of a collagen dressing covered with a foam dressing with the same foam used as a primary dressing in stagnating granulating pressure ulcer patients. Method: Patients were randomised to receive either a foam dressing (Suprasorb P; Lohmann & Rauscher) as a primary dressing (group A), or a combination of a ...
A, Piatkowski +5 more
openaire +2 more sources
Development and application of stagnation pressure probe for dusty gas measurements
Review of Scientific Instruments, 1995The design, development and application of a fast response probe for measuring gas phase pressures under dusty flow conditions are described. Measured results for this probe, historically designated as the ‘‘Snob’’ probe, demonstrate satisfactory resolution of past limitations on output performance.
R. G. Batt +4 more
openaire +1 more source
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 +1 more source
Shock Oscillations in a Supersonic Diffuser Flow with Varying Stagnation Pressure
2019The flow in supersonic wind tunnel diffusers is usually transonic in nature, and the formation of a normal shock just downstream of the diffuser throat region is required for power economy. The behavior of this starting normal shock decides the start or unstarts of a supersonic wind tunnel.
Jintu K. James, T. M. Muruganandam
openaire +1 more source
Inlet Stagnation Pressure Loss Estimate for a Simplified Thrust Model
47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, 2009In a previous work, the author presented a simplified thrust model to be used in predicting the performance of high-speed aircraft. That model contained an ad hoc estimate of the stagnation pressure loss in the inlet/diffuser of the engine. The current analysis attempts to capture some of the actual physics of the flow, modeling the incoming flow as a ...
openaire +1 more source
Advancement of Empirical Model for Stagnation Pressure Gain in RDCs
AIAA SCITECH 2022 Forum, 2022Eric Bach +3 more
openaire +1 more source