Mathematical modeling of a cryogenic jet pump with flows of different temperatures

1990 ◽  
Vol 26 (1) ◽  
pp. 18-22
Author(s):  
N. V. Filin ◽  
S. L. Simkhovich ◽  
I. F. Sultanov
2000 ◽  
Vol 123 (3) ◽  
pp. 701-706 ◽  
Author(s):  
N. Beithou ◽  
H. S. Aybar

The steam-driven jet pump (SDJP) is a device without moving parts, in which steam is used as an energy source to pump cold water from a pressure much lower than the steam pressure to a pressure higher than the steam pressure. In the previous part of this study, the mathematical modeling of the SDJP has been done, and reported. The results of the mathematical modeling of the SDJP have been compared with Cattadori’s experimental results. The comparisons show that the experimental and calculated pressure distributions are in good qualitative agreement. For the same steam inlet pressure of 8.7 MPa, the discharge pressures in the experiment and in the simulation are 9.8 MPa and 9.54 MPa, respectively. The relative difference is two percent. It can be said that the computed discharge pressure is in good agreement with the experimental result. In the current study, a parametric analysis of the SDJP has been done in terms of four independent parameters: steam inlet pressure and temperature, supply water pressure, and temperature. The output parameters are: discharge pressure, temperature, and mass flow rate. As a result of this parametric study, the operation characteristics of the SDJP have been obtained.


2021 ◽  
pp. 2150293
Author(s):  
U. I. Erkaboev ◽  
R. G. Rakhimov ◽  
N. A. Sayidov

The calculation of the coefficients of magneto-optical absorption in semiconductors at different temperatures and pressures is carried out. A formula for the temperature dependence of the oscillations of the combined density of states by the Kane dispersion law is obtained. Mathematical modeling has been carried out that determines the magneto-optical absorption coefficient in semiconductors in the presence of external influences. A new method for determining the magneto-optical absorption coefficient in semiconductors in the presence of pressure and temperature is proposed. The correspondence of simulation results with experimental data is shown.


Author(s):  
F. DALCANTON ◽  
F. R. S. MACHADO JR ◽  
D. A. LONGHI ◽  
B. A. M. CARCIOFI ◽  
J. B. LAURINDO ◽  
...  

2000 ◽  
Vol 123 (3) ◽  
pp. 693-700 ◽  
Author(s):  
N. Beithou ◽  
H. S. Aybar

There are several proposed advanced reactor systems, which consider the utilization of a steam-driven jet pump (SDJP) as an emergency core cooling system. The steam-driven jet pump is a device without moving parts, in which steam is used as an energy source to pump cold water from a pressure much lower than the steam pressure to a pressure higher than the steam pressure. In this study, the mathematical modeling of the SDJP has been done. An experimental analysis of the high-pressure SDJP has been reported by Cattadori et al. The results of the mathematical modeling of the SDJP have been compared with Cattadori’s experimental results. The comparisons show that the experimental and calculated pressure distributions are in good qualitative agreement. A parametric analysis of the SDJP is ongoing.


Harmful Algae ◽  
2017 ◽  
Vol 67 ◽  
pp. 13-25 ◽  
Author(s):  
Crettaz Minaglia Melina Celeste ◽  
Rosso Lorena ◽  
Aranda Jorge Oswaldo ◽  
Goñi Sandro ◽  
Sedan Daniela ◽  
...  

2015 ◽  
Vol 1085 ◽  
pp. 460-464
Author(s):  
Mikhail Semenov ◽  
Svetlana Kolupaeva

In this study, the phenomenon of creep of face-centered cubic (FCC) crystals have been studied by mathematical modeling. The effect of applied stress on creep curves of copper at different temperatures and stress were performed. We have found that steady-state creep rate is proportional to the applied stress and observed the Stages I-III of creep.


2015 ◽  
Vol 14 (2) ◽  
pp. 247-259
Author(s):  
P.C. Coradi ◽  
L.V. Milane ◽  
C.F. Dias ◽  
F.H.R. Baio

2021 ◽  
Vol 341 ◽  
pp. 117350 ◽  
Author(s):  
Homa Rezaei ◽  
Elaheh Rahimpour ◽  
Fleming Martinez ◽  
Hongkun Zhao ◽  
Abolghasem Jouyban

Sign in / Sign up

Export Citation Format

Share Document