scholarly journals Large Eddy Simulation of a Steady Flow Test Bench Using OpenFOAM®

2016 ◽  
Vol 101 ◽  
pp. 622-629 ◽  
Author(s):  
Cristian Catellani ◽  
Giulio Cazzoli ◽  
Stefania Falfari ◽  
Claudio Forte ◽  
Gian Marco Bianchi
Keyword(s):  
Large Eddy Simulation ◽  
Steady Flow ◽  
Test Bench ◽  
Eddy Simulation ◽  
Flow Test ◽  
Large Eddy ◽  
Steady Flow Test

Study of the influence of nozzle seat type on injection rate and spray behaviour

2005 ◽  
Vol 219 (5) ◽  
pp. 677-689 ◽  
Author(s):  
V Bermúdez ◽  
R Payri ◽  
F J Salvador ◽  
A H Plazas
Keyword(s):  
Steady Flow ◽  
Air Entrainment ◽  
Injection Rate ◽  
Point Of View ◽  
Flow Conditions ◽  
Test Rig ◽  
Spray Cone ◽  
Flow Test ◽  
Rate Test ◽  
Steady Flow Test

A deep analysis of the injection rate characteristics and spray behaviour of the most used nozzle types in diesel engines [microSAC and valve covered orifice (VCO)] has been carried out. In order to compare the injection characteristics and the spray behaviour of both nozzle types, several experimental installations were used, such as the steady flow test rig, injection rate test rig, spray momentum test rig, and nitrogen test rig, to obtain a full hydrodynamic and spray characterization. The study of the flow in both nozzles was analysed under steady flow conditions in the steady flow test rig and in real unsteady flow conditions in the injection rate test rig and the spray momentum test rig. The macroscopic properties of the spray (tip penetration and spray cone angle) were characterized using a high-pressure test rig. From the point of view of the internal flow behaviour, the results showed interesting differences in the permeability of both nozzle geometries, with a higher discharge coefficient in the microSAC nozzle. However, from the point of view of air entrainment, the results showed a better quality of fuel-air mixing in the VCO nozzle. Besides the evidence from the experimental results, a theoretical analysis was carried out in order to identify the most important parameters that determine the spray behaviour and thus justify the different macroscopic behaviour of both nozzles.

scholarly journals Application of Les, Pans and Rans to a Case of Intake Channel Steady Flow Test Bench

2015 ◽  
Vol 13 (3) ◽  
pp. 14-23
Author(s):  
Oldřich Vítek ◽  
Radek Tichánek ◽  
Petr Hatschbach
Keyword(s):  
Steady Flow ◽  
Test Bench ◽  
Flow Test ◽  
Steady Flow Test

Shrnutí Članek se zabyva vyhodnocenim průtokovych vlastnosti (průtokovy součinitel, součinitel přične a tečne rotace) saciho kanalu užitim jak 3-D CFD simulace, tak měřeni. Byla provedena citlivostni studie různych parametrů simulace. Nejdůležitějši jsou vlastnosti sitě a použite modely turbulence (uvažovane modely: LES, PANS a RANS). Co se tyka sitě, tak kritickym parametrem je konfigurace v těsne blizkosti stěny - tloušťka a počet vrstev těsně u stěny maji velky vliv na průtok, avšak součinitele přične a tečne rotace na tom teměř nezavisi. Odtud plyne, že tyto parametry sitě lze považovat za ladici parametry CFD modelu. Co se tyka velikosti oka sitě, 2 velikosti byly testovany (0.6 a 0.3 mm). Ukazalo se, že ani jedna z těchto siti neni dostatečně jemna pro korektni aplikaci LES. A tedy PANS funguje spiše jako RANS. Z hlediska modelů turbulence je PANS jevi jako nejlepši možnost, protože kombinuje vyhody jak LES, tak RANS. Obecně je možne konstatovat, že lze dosahnout relativně dobre shody na průtoku, ale součinitele přične a tečne rotace jsou problematicke, neboť byla dosažena pouze kvalitativni shoda.

scholarly journals Steady-Flow Test for Tumble in an Engine Cylinder.

1994 ◽  
Vol 60 (578) ◽  
pp. 3577-3582
Author(s):  
Yoshisuke Hamamoto ◽  
Eiji Tomita ◽  
Guobang Liu ◽  
Seiichi Tanabe ◽  
Zhong Zhang
Keyword(s):  
Steady Flow ◽  
Engine Cylinder ◽  
Flow Test ◽  
Steady Flow Test

An Experimental Study on Measurement of Flow Coefficient Using the Steady-Flow Test Rig

2012 ◽  
Vol 36 (4) ◽  
pp. 423-429 ◽  
Author(s):  
Sang-Wook Park ◽  
Ik-Soo Choi ◽  
Ki-Chol Noh ◽  
Soon-Pil Ryu ◽  
Keon-Sik Yoon
Keyword(s):  
Experimental Study ◽  
Steady Flow ◽  
Flow Coefficient ◽  
Test Rig ◽  
Flow Test ◽  
Steady Flow Test

A Numerical Investigation on the Volute/Diffuser Interaction due to the Axial Distortion at Impeller Exit

2000 ◽  
Author(s):  
Fahua Gu ◽  
Abraham Engeda ◽  
Mike Cave ◽  
Jean-Luc Di Liberti
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Investigation ◽  
Steady Flow ◽  
Centrifugal Compressor ◽  
Vortex Structure ◽  
Flow Model ◽  
Single Stage ◽  
Mass Flows

Abstract A numerical simulation is performed on a single stage centrifugal compressor using the commercially available CFD software, CFX-TASCflow. The steady flow is obtained by circumferentially averaging the exit fluxes of the impeller. Three runs are made at design condition and off-design conditions. The predicted performance is in agreement with experimental data. The flow details inside the stationary components are investigated, resulting in a flow model describing the volute/diffuser interaction at design and off-design conditions. The recirculation and twin vortex structure are found to explain the volute loss increase at lower and higher mass flows, respectively.

Sign in / Sign up

Export Citation Format

Share Document