Gas and liquid phase transport in pulsed fuel sprays

1996 ◽  
Author(s):  
Pete Jennings ◽  
James Drallmeier
Keyword(s):  
Liquid Phase ◽  
Fuel Sprays ◽  
Phase Transport

Paper 33: Liquid Phase Movement in the Last Stages of Large Condensing Steam Turbines

1969 ◽  
Vol 184 (7) ◽  
pp. 70-91 ◽  
Author(s):  
J. Valha
Keyword(s):  
Liquid Phase ◽  
Droplet Size ◽  
Liquid Films ◽  
Steam Turbines ◽  
Blade Surface ◽  
Spontaneous Condensation ◽  
Primary Droplet ◽  
The Stability ◽  
Phase Transport ◽  
Thermodynamic Instability

This paper deals with the generation and the movement of the liquid phase in the last stages of large condensing steam turbines. Considering thermodynamic instability, the primary droplet size resulting from spontaneous condensation is dependent on radial position, the flow, and inlet parameters. The analysis of the liquid phase transport to the blade surface is given, and the stability and disintegration of the liquid films on the blade surface is discussed.

2-D Measurements of the Liquid Phase Temperature in Fuel Sprays

1995 ◽  
Author(s):  
Takuo Yoshizaki ◽  
Takeshi Funahashi ◽  
Keiya Nishida ◽  
Hiroyuki Hiroyasu
Keyword(s):  
Liquid Phase ◽  
Fuel Sprays ◽  
Phase Temperature

Modeling the vertical soil organic matter profile using <sup>210</sup>Pb<sub>ex</sub> measurements and Bayesian inversion

2011 ◽  
Vol 8 (4) ◽  
pp. 7257-7312 ◽  
Author(s):  
M. C. Braakhekke ◽  
T. Wutzler ◽  
M. Reichstein ◽  
J. Kattge ◽  
C. Beer ◽  
...  
Keyword(s):  
Organic Matter ◽  
Parameter Estimation ◽  
Liquid Phase ◽  
Soil Organic Matter ◽  
Additional Information ◽  
Root Litter ◽  
Matter Transport ◽  
Phase Liquid ◽  
Final Optimization ◽  
Phase Transport

Abstract. In view of its potential significance for soil organic matter (SOM) cycling, the vertical SOM distribution in the profile should be considered in models. To mechanistically predict the SOM profile, three additional processes should be represented compared to bulk SOM models: (vertically distributed) rhizodeposition, mixing due to bioturbation, and movement with the liquid phase as dissolved organic matter. However, the convolution of these processes complicates parameter estimation based on the vertical SOM distribution alone. Measurements of the atmospherically produced isotope 210Pbex may provide the additional information needed to constrain the processes. Since 210Pbex enters the soil at the surface and bind strongly to organic matter it is an effective tracer for SOM transport. In order to study the importance of root input, bioturbation, and liquid phase transport for SOM profile formation we performed Bayesian parameter estimation of the previously developed mechanistic SOM profile model SOMPROF. 13 parameters, related to decomposition and transport of organic matter, were estimated for the soils of two temperate forests with strongly contrasting SOM profiles: Loobos (the Netherlands) and Hainich (Germany). Measurements of organic carbon stocks and concentrations, decomposition rates, and 210Pbex profiles were used in the optimization. For both sites, 3 optimizations were performed in which stepwise 210Pbex data and prior knowledge were added. The optimizations yielded posterior distributions with several cases (modes) which were characterized by the dominant organic matter (OM) pool: non-leachable slow OM, leachable slow OM, or root litter. For Loobos, the addition of 210Pbex data to the optimization clearly indicated which case was most likely. For Hainich, there is more uncertainty, but the most likely case produced by the optimization agrees well with other measurements. For both sites the most likely case of the final optimization was one where leachable slow OM dominates, suggesting that most organic matter is adsorbed to the mineral phase. Liquid phase transport (advection) of OM was responsible for virtually all organic matter transport for Loobos, while for Hainich bioturbation (diffusion) and liquid phase transport were of comparable magnitude. These results are in good agreement with the differences between the two sites in terms of soil texture and biological activity.

LIQUID PHASE TRANSPORT PROPERTIES IN A HIGH PRESSURE PACKED COLUMN

1993 ◽  
Vol 125 (1) ◽  
pp. 1-12 ◽  
Author(s):  
JIN CHU CHEN ◽  
Y.T. SHAH ◽  
MARTIN A. ABRAHAM
Keyword(s):  
High Pressure ◽  
Liquid Phase ◽  
Transport Properties ◽  
Packed Column ◽  
Phase Transport

Liquid and vapour phase transport in soil

Soil Research ◽  
1976 ◽  
Vol 14 (1) ◽  
pp. 33 ◽  
Author(s):  
DR Scotter
Keyword(s):  
Liquid Phase ◽  
Vapour Phase ◽  
Physical Parameters ◽  
Phase Flow ◽  
Order Of Magnitude ◽  
Vapour Phase Transport ◽  
Comparable Magnitude ◽  
Phase Transport ◽  
Water Contents ◽  
Good Agreement

Measurements of the desorption soil water diffusivities for vapour and liquid phase flow in a loamy sand and a clay at water contents covering the range between air dry and permanent wilting point are reported. The liquid and vapour components were separated using soil columns maintained at various air pressures. Vapour diffusivities were also calculated from desorption isotherms. At some water contents the measured vapour diffusivities were up to an order of magnitude greater than the calculated values. Liquid phase flow was detected in soils nearly air dry, suggesting some solute transport can occur under such conditions. The liquid and vapour diffusivities were found to be of comparable magnitude over a range of water contents, rather than each cutting off sharply as has been suggested in the literature. The measured component diffusivities at 298 K were used to calculate the total diffusivities at other temperatures, using the temperature coefficients of the basic physical parameters governing liquid and vapour flow, and good agreement was found between measured and calculated values.

Sign in / Sign up

Export Citation Format

Share Document