Pressure distribution in gas flow in the presence of a fibrous filter in the channel

1976 ◽  
Vol 31 (2) ◽  
pp. 922-924
Author(s):  
B. I. Ogorodnikov ◽  
V. I. Skitovich ◽  
V. I. Khabarov
Keyword(s):  
Pressure Distribution ◽  
Gas Flow ◽  
Fibrous Filter

Analysis of pressure distribution for the various gas flow vacuum system in the range from 1Pa to 133Pa

Measurement ◽  
2013 ◽  
Vol 46 (2) ◽  
pp. 851-854
Author(s):  
S.S. Hong ◽  
Wakil khan ◽  
Y.K. Park ◽  
Y.H. Shin
Keyword(s):  
Pressure Distribution ◽  
Gas Flow ◽  
Vacuum System

Effect of Solid Particles on Turbine Performance

1976 ◽  
Vol 98 (1) ◽  
pp. 47-52 ◽  
Author(s):  
W. Tabakoff ◽  
W. Hosny ◽  
A. Hamed
Keyword(s):  
Pressure Distribution ◽  
Gas Flow ◽  
Theoretical Method ◽  
Solid Particles ◽  
Injection System ◽  
Particle Injection ◽  
Turbine Efficiency ◽  
Turbine Performance ◽  
Experimental Pressure ◽  
Good Agreement

A theoretical method was developed for predicting the pressure distribution over a blade in cascade for a compressible flow with solid particles. Experimental results were obtained from a cascade wind tunnel equipped with a solid particle injection system. Good agreement was noted between the theoretical and experimental pressure distribution. The change in pressure due to the particles gives reduction in the force on the blades. The presence of solid particles in air-breathing engine gas flow changes the turbine performance. The overall turbine efficiency decreases as a result of the introduction of solid particles. The performance experiment was performed on a two-stage velocity-compounded turbine.

The Study of the Ventilation Influence to Gas-Based Direct Reduction Shaft Furnace Flow Field

2013 ◽  
Vol 405-408 ◽  
pp. 2990-2993
Author(s):  
Ming Hua Bai ◽  
Jun Li Ge ◽  
Ying Min Piao ◽  
Jian Wang ◽  
Yuan Xiang Fu ◽  
...  
Keyword(s):  
Flow Field ◽  
Pressure Distribution ◽  
Gas Flow ◽  
Shaft Furnace ◽  
Direct Reduction ◽  
Gas Velocity ◽  
Reducing Gas ◽  
Key Factor ◽  
Reduction Section ◽  
Furnace Reduction

Direct reduced iron (DRI) shaft furnace flow field has important influence to the DRI production process, and the ventilation is a key factor for the velocity and pressure distribution of the gas flow in the furnace. At present works, the direct reducing gas velocity distribution and pressure distribution of DRI shaft furnace were studied with different ventilation. By the analysis of numerical simulation, the result was found that the direct reducing gas velocity increase with height in the shaft furnace reduction section. The velocity of the direct reducing gas augment with the increase of ventilation. The direct reducing gas pressure add with increasing height in the shaft furnace reduction section. With ventilation increasing, the pressure of the shaft furnace ventral part increase, and the pressure gradient increase in the direction of height in the DRI shaft furnace.

Aeroelastic Analysis of Last Stage LP Steam Turbine Rotor Blades With Exhaust Hood for Various Non-Nominal Regimes

2018 ◽  
Author(s):  
Romuald Rzadkowski ◽  
Vitaly Gnesin ◽  
Lubov Kolodyazhnaya ◽  
Ryszard Szczepanik
Keyword(s):  
Pressure Distribution ◽  
Steam Turbine ◽  
Gas Flow ◽  
Element Model ◽  
Turbine Rotor ◽  
Ideal Gas ◽  
Rotor Blades ◽  
Exhaust Hood ◽  
Flow Through ◽  
Last Stage

Presented here are the numerical calculations of the 3D transonic flow of an ideal gas through an LP steam turbine last stage with exhaust hood, taking into account blade oscillations. The approach is based on a solution to the coupled aerodynamic-structure problem for 3D flow through a turbine stage using the partially integrated method. The blade oscillations and loads acting on the blades are a part of the solution. An ideal gas flow through the stator and moving rotor blades with periodicity on the whole annulus is described by unsteady Euler conservation equations, integrated with the Godunov-Kolgan explicit monotonous finite-volume difference scheme and a moving hybrid H-H rotor blade grid. The structural analysis uses the modal approach and a 3D finite element model of a blade. The proposed algorithm allows for the calculation of turbine stages with an arbitrary pitch ratio of stator and rotor blades, taking into account unsteady-load induced blade oscillations. The pressure distribution behind the rotor blades was non-uniform on account of the exhaust hood. As a result of the fluid-structure interaction and exhaust hood induced nonsymmetrical pressure distribution behind the rotor blades, the first blade mode was no longer bending but bending-torsion.

Preparation and Properties of Novel Aerodynamic Pressure-sensitive Paint Via the Sol-gel Method

2002 ◽  
Vol 17 (6) ◽  
pp. 1312-1319 ◽  
Author(s):  
Feng-Zhi Jiang ◽  
Ren Xu ◽  
Duo-Yuan Wang ◽  
Xing-De Dong ◽  
Gui-Chun Li ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Gas Flow ◽  
Sol Gel ◽  
Silica Matrix ◽  
Pressure Sensitive Paint ◽  
Gel Method ◽  
Sol Gel Method ◽  
Aerodynamic Pressure ◽  
Pressure Sensitive ◽  
Oxygen Sensitive

A novel aerodynamic pressure-sensitive paint (PSP) was prepared by using the sol-gel process for measuring the pressure distribution variation on an aerodynamic surface with an oxygen-containing gas flow. In this PSP, RuII complexes as oxygen-sensitive probe molecules excited with visible light of 436 nm were dispersed into the organic modified silica matrix film prepared by the sol-gel method. A linear relationship between the emission intensity and the oxygen partial pressure was achieved in the airflow pressure range of 10.1–405 kPa, and the slope that represents the sensitivity of PSP for oxygen quenching reaches 0.75. A pressure distribution map was demonstrated showing a spatial resolution of 0.25 mm.

Equilibrium shape and stability of a liquid cylinder in cross flow at low Weber numbers

1982 ◽  
Vol 116 ◽  
pp. 393-409 ◽  
Author(s):  
D. Weihs ◽  
I. Frankel
Keyword(s):  
Pressure Distribution ◽  
Cross Section ◽  
Gas Flow ◽  
Dynamic Pressure ◽  
Equilibrium Shape ◽  
Circular Cross Section ◽  
Cross Flow ◽  
Two Factors ◽  
Break Up ◽  
The Stability

The cross-section shape and stability of a liquid cylinder moving perpendicularly to its axis in a gaseous medium is studied. Such liquid cylinders are formed during the break-up process of thin, rapidly moving liquid sheets, appearing in spray and atomization processes. The equilibrium shape is affected mainly by two factors: the dynamic-pressure distribution in the gas flow and the surface tension on the liquid boundary. The former tends to distort the liquid cross-section into an oval shape while the latter tends to restore the circular cross-section.A series expansion for the shape of the cylinder cross-section was determined by assuming incompressible potential flow, neglecting the effects of body forces and internal circulation in the liquid.The stability analysis shows that in the range of low Weber numbers the cylinder break-up is due to the divergence of varicose perturbations. The wavenumber of the most rapidly growing perturbation, its rate of growth and the maximal wavenumber for which varicose instability occurs, are all found to decrease as the Weber number grows, owing to a pressure distribution caused by the varicose distortion, which tends to reduce these perturbations.

Applying Method of Characteristics to Determine Pressure Distribution in 1D Shale-Gas Samples

SPE Journal ◽  
2013 ◽  
Vol 19 (03) ◽  
pp. 361-372 ◽  
Author(s):  
R. Ghanbarnezhad Moghanloo ◽  
F.. Javadpour
Keyword(s):  
Pressure Distribution ◽  
Shale Gas ◽  
Gas Flow ◽  
Method Of Characteristics ◽  
Continuum Approximation ◽  
Apparent Permeability ◽  
Reservoir Performance ◽  
Pressure Profiles ◽  
Slippage Effect ◽  
Gas Expansion

Summary This paper examines application of the method of characteristics (MOC) to determine pressure distribution in a 1D matrix of shale gas. Because of gas expansion and local desorption in shale gas, pressure distribution changes during production. We developed a semianalytic MOC solution of gas flow in shale by use of the analogous-continuum approximation (apparent permeability). The MOC solution is derived with the inclusion of compressibility, gas-slippage effect, and desorption. Through quantitative comparison of pressure profiles and history plots, we used a simulation approach to verify the accuracy of the analytic solution. Results suggest that the simulation results are consistent with our MOC solution, which can also be used to evaluate impacts of different parameters on pressure distribution. Prediction of pressure distribution over time will greatly enhance approximation of reservoir performance.

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