Transient Thermal Mixing In A Model PWR Downcomer And Attached Cold Leg With Simulated High Pressure Injection

1986 ◽  
Author(s):  
A. Hashemi ◽  
J. Goodman ◽  
J. P. Sursock
Keyword(s):  
High Pressure ◽  
Thermal Mixing ◽  
Pressure Injection ◽  
Transient Thermal ◽  
High Pressure Injection

A Numerical Investigation on Mixing Characteristics of Natural Gas Jets With High-Pressure Injection

2021 ◽  
Author(s):  
Long Liu ◽  
Tianyang Dai ◽  
Qian Xiong ◽  
Yuehua Qian ◽  
Bo Liu
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Air Entrainment ◽  
Gas Jet ◽  
Swirl Ratio ◽  
Marine Engine ◽  
Low Speed ◽  
Pressure Injection ◽  
Mixing Characteristics ◽  
High Pressure Injection

Abstract With increasingly stringent emissions limitation of greenhouse gas and atmospheric pollutants for ship, the direct injection of natural gas on the cylinder head with high-pressure injection is an effective method to make a high power output and decrease harmful gas emissions in marine natural gas dual fuel engines. However, the effects on mixing characteristics of high-pressure natural gas underexpanded jet have not been fully understood. Especially, the injection pressure is up to 30 MPa with large injection quantity and critical surrounding gas conditions for the low-speed two-stroke marine engine. Therefore, this research is focused on the flow and mixing process of the natural gas jet with high-pressure injection under the in-cylinder conditions of low-speed two-stroke marine engine. The gas jet penetration, the distribution of velocity and density, the equivalence ratio and air entrainment have been analyzed under different nozzle hole diameters by numerical simulation. The effects of surrounding gas conditions including pressure, temperature and swirl ratio on air entrainment and equivalence ratio distribution were studied in detail. From the numerical simulation, it is found that the mixing characteristics of natural gas jet can be improved under in-cylinder conditions of higher ambient temperature and swirl ratio, which is relevant to the low-speed two-stroke marine engine.

scholarly journals High-Pressure Injection Injuries from Thinners. A Case Report.

1998 ◽  
Vol 47 (3) ◽  
pp. 995-997
Author(s):  
Goichi Okahara ◽  
Hiroshi Hokama ◽  
Kunihiko Uehara ◽  
Fuminori Kanaya
Keyword(s):  
High Pressure ◽  
Case Report ◽  
Pressure Injection ◽  
High Pressure Injection

Understanding High-pressure Injection Primary Breakup by Using Large Eddy Simulation and X-ray Spray Imaging

MTZ worldwide ◽  
2017 ◽  
Vol 78 (5) ◽  
pp. 50-57 ◽  
Author(s):  
Junmei Shi ◽  
Pablo Lopez Aguado ◽  
Noureddine Guerrassi ◽  
Gavin Dober
Keyword(s):  
High Pressure ◽  
Large Eddy Simulation ◽  
X Ray ◽  
Eddy Simulation ◽  
Pressure Injection ◽  
Large Eddy ◽  
Primary Breakup ◽  
High Pressure Injection

scholarly journals High-pressure injection injuries to the hand: A 14-year descriptive study

2019 ◽  
Vol 9 (2) ◽  
pp. 64
Author(s):  
Ayman El-Menyar ◽  
Mohammad Muneer ◽  
Saif Badran ◽  
Ali Alkhafaji ◽  
Habib Al-Basti ◽  
...  
Keyword(s):  
High Pressure ◽  
Descriptive Study ◽  
Pressure Injection ◽  
High Pressure Injection
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