INFLATABLE SPHERICAL SPIRAL ANTENNA OF DECAMETER RANGE FOR USE IN POP-UP INFORMATION (EMERGENCY-INFORMATION) DEVICES OF NAVY

2020 ◽  
pp. 98-110
Author(s):  
A. A. Tipikin ◽  
S. V. Belkov
Keyword(s):  
Gas Injection ◽  
Wind Load ◽  
Injection System ◽  
Spiral Antenna ◽  
Decameter Range

The drawbacks of the existing antenna-feeder devices of decameter range used in pop-up information (emergency information) devices are analyzed. A variant of the solution in the form of an inflatable spherical spiral antenna is proposed. The characteristics of the antenna have been calculated, and approximate data have been obtained for the gas injection system and the withstanding wind load.

Manifold concept design for ITER Gas Injection System

2011 ◽  
Author(s):  
T. Jiang ◽  
B. Li ◽  
W. Li ◽  
M. Wang ◽  
Y. Pan ◽  
...  
Keyword(s):  
Gas Injection ◽  
Injection System ◽  
Concept Design

scholarly journals Parametric investigation of a large two-stroke marine high-pressure direct injection engine by using computational fluid dynamics method

2020 ◽  
Vol 234 (3) ◽  
pp. 699-711
Author(s):  
Renyou Yang ◽  
Gerasimos Theotokatos ◽  
Dracos Vassalos
Keyword(s):  
Direct Injection ◽  
Gas Injection ◽  
Injection System ◽  
Injection Timing ◽  
Ansys Fluent ◽  
Engine Operation ◽  
Lateral Angle ◽  
Parametric Investigation ◽  
Injection Duration ◽  
Engine Power

This study aims at the parametric investigation of the gas injection system settings of a large marine two-stroke dual fuel engine by using a developed and customized CFD method in the ANSYS Fluent software. The investigated engine injection system parameters include the gas injection timing, the gas injection duration, the gas injector lateral angle, and the gas injector holes number. Based on the comparison of the predicted performance parameters for the closed-cycle processes, the results indicate that the gas injector lateral angle is the most significant parameter that affects the engine power as well as the NO and CO2 emissions. For satisfying the contradictory objectives of retaining the engine power and reducing the NO and CO2 emissions, appropriate design settings for the gas injection are recommended for the investigated engine operation in the gas mode at 75% load.

scholarly journals A novel tracer-gas injection system for scrape-off layer impurity transport and screening experiments

1999 ◽  
Vol 266-269 ◽  
pp. 571-576 ◽  
Author(s):  
B. LaBombard ◽  
S. Gangadhara ◽  
B. Lipschultz ◽  
S. Lisgo ◽  
D.A. Pappas ◽  
...  
Keyword(s):  
Gas Injection ◽  
Injection System ◽  
Tracer Gas ◽  
Screening Experiments ◽  
Impurity Transport

Effects of Ammonia Gas Mixed Into Intake Air on Combustion and Emissions Characteristics in Diesel Engine

2016 ◽  
Author(s):  
Yoichi Niki ◽  
Dong-Hoon Yoo ◽  
Koichi Hirata ◽  
Hidenori Sekiguchi
Keyword(s):  
Diesel Engine ◽  
Catalytic Reduction ◽  
Gas Injection ◽  
Experimental Results ◽  
Injection System ◽  
Emission Characteristics ◽  
Diesel Injection ◽  
Injection Quantity ◽  
Carbon Dioxide Co2 ◽  
Scr System

This paper reports on the experimental results of the combustion and emission characteristics of a conventional diesel engine mixed ammonia (NH3) gas into the intake air, and discusses its usability. In the experiments, NH3 gas was injected into the intake pipe of the diesel engine by a gas injector. The diesel engine has a natural aspiration single cylinder with 7.7 kW rated power at 1500 rpm and a diesel injection system to inject diesel fuel into the cylinder. As experimental results on the combustion characteristics, it was confirmed that the compression and maximum pressures in the cylinder decreased and the ignition timing delayed with increasing the NH3 gas injection quantity. On the emission characteristics in the exhaust gas, NH3, water (H2O) and nitrous oxide (N2O) increased and carbon dioxide (CO2) decreased proportionally to the NH3 gas injection quantity. In contract, the nitrogen oxide (NO) was nearly the same. Moreover, it was confirmed that NH3 can be reduced by reacting with NO in a selective catalytic reduction (SCR) system.

HCNG Evaluation Using a Sequential Gas Injection System for a Passenger Car

2009 ◽  
Author(s):  
D.S. Khatri ◽  
V. Singh ◽  
N.K. Pal ◽  
M. Maheshwari ◽  
S. Singh ◽  
...  
Keyword(s):  
Gas Injection ◽  
Injection System ◽  
Passenger Car
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