scholarly journals Retrieval of Gas Temperature and Pressure Based on Rayleigh–Brillouin Spectrum

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 22964-22975
Author(s):  
Peng Zhang ◽  
Jiaqi Xu ◽  
Ruizhe Zhang ◽  
Qian Sun ◽  
Hang Wu ◽  
...  
Keyword(s):  
Gas Temperature ◽  
Temperature And Pressure ◽  
Brillouin Spectrum

scholarly journals Analysis of Internal Gas Leaks in an MCFC System Package for an LNG-Fueled Ship

2019 ◽  
Vol 9 (11) ◽  
pp. 2330
Author(s):  
Gilltae Roh ◽  
Youngseung Na ◽  
Jun-Young Park ◽  
Hansung Kim
Keyword(s):  
Fuel Cell ◽  
Flow Simulation ◽  
Cell System ◽  
Molten Carbonate Fuel Cell ◽  
Gas Temperature ◽  
Molten Carbonate ◽  
Fuel Cell System ◽  
Gas Leakage ◽  
Gas Leak ◽  
Temperature And Pressure

The airflow inside the housing of a 300-kW molten carbonate fuel cell (MCFC) system is designed to ensure safety in case of a gas leak by applying computational fluid dynamics (CFD) techniques. In particular, gas accumulating zones are identified to prevent damage to vulnerable components from high temperature and pressure. Furthermore, the location of the alarm unit with the gas-leak detector is recommended for construction of safe MCFC ships. In order to achieve this, a flow-tracking and contour field (for gas, temperature, and pressure) including a fuel-cell stack module, balance-of-plant, and various pipes is developed. With the simulated flow field, temperature flow is interpreted for the heating conditions of each component or pipe in order to find out where the temperature is concentrated inside the fuel cell system, as well as the increase in temperature at the exit. In addition, the gas leakage from the valves is investigated by using a flow simulation to analyze the gas and pressure distribution inside the fuel cell system.

scholarly journals The effects of exchange gas temperature and pressure on the beta-layering process in solid deuterium-tritium fusion fuel

1990 ◽  
Vol 165-166 ◽  
pp. 163-164 ◽  
Author(s):  
James K. Hoffer ◽  
Larry R. Foreman ◽  
John D. Simpson ◽  
Ted R. Pattinson
Keyword(s):  
Gas Temperature ◽  
Solid Deuterium ◽  
Temperature And Pressure

The Prediction of Laminar Flame Speeds for Weak Mixtures

1996 ◽  
Author(s):  
D. Kretschmer ◽  
J. Odgers
Keyword(s):  
Laminar Flame ◽  
Laminar Flames ◽  
Inlet Temperature ◽  
Flame Extinction ◽  
Correction Factors ◽  
Gas Temperature ◽  
Temperature And Pressure ◽  
Stirred Reactors

In a recent publication [3], the authors tentatively explored the prediction of propane flame speeds using the calculated burned gas temperature (Tb) and the predicted flame extinction temperature (Ti). A formula was developed which utilised the above temperatures together with correction factors for inlet temperature and the oxygen/inert ratio. The present paper has extended this technique so that data from 20 different fuels have been examined over a range of conditions which include significant variations of both inlet temperature and pressure. Limitations of the technique are discussed, as are possible related applications to other premixed systems such as laminar flames and well-stirred reactors.

scholarly journals A Review Paper on Simulation and Modeling of Combustion Characteristics under High Ambient and High Injection of Biodiesel Combustion

2015 ◽  
Vol 773-774 ◽  
pp. 580-584
Author(s):  
Adiba Rhaodah Andsaler ◽  
Amir Khalid ◽  
Him Ramsy ◽  
Norrizam Jaat
Keyword(s):  
Cfd Simulation ◽  
Ambient Pressure ◽  
Combustion Characteristics ◽  
Spray Angle ◽  
Effect Of Temperature ◽  
Gas Temperature ◽  
Common Rail System ◽  
High Injection ◽  
Air Mixing ◽  
Temperature And Pressure

This paper describes simulation of combustion characteristics under high ambient and high injection of biodiesel combustion by using CFD simulation. Diesel engine performance and emissions is strongly couple with fuel atomization and spray processes, which in turn are strongly influenced by injector flow dynamics. The principal objective of this research is to seek the effect of temperature and pressure on the spray characteristics, as well as fuel-air mixing characteristics. Experiments were performed in a constant volume chamber at specified ambient gas temperature and pressure. This research was continued with injecting diesel fuel into the chamber using a Bosch common rail system. Direct photography technique with a digital camera was used to clarify the real images of spray pattern, liquid length and vapor penetration. The method of the simulation of real phenomenon of diesel combustion with optical access rapid compression machine is also reviewed and experimental results are presented. The liquid phase of the spray reaches a maximum penetration distance soon after the start of injection, while the vapor phase of the spray continues to penetrate downstream. The condition to which the fuel is affected was estimated by combining information on the block temperature, ambient temperature and photographs of the spray. The increases in ambient pressure inside the chamber resulting in gain of spray area and wider spray angle. Thus predominantly promotes for a better fuel-air mixing. All of the experiments will be conducted and run by using CFD. The simulation will show in the form of images.

Dynamic measurement of gas temperature and pressure using infrared spectroscopy

1995 ◽  
Author(s):  
R. Berman ◽  
P. Duggan ◽  
M. P. LeFlohic ◽  
A. D. May ◽  
J. R. Drummond
Keyword(s):  
Infrared Spectroscopy ◽  
Dynamic Measurement ◽  
Gas Temperature ◽  
Temperature And Pressure

scholarly journals Analisa Waktu Operasi Terhadap Temperatur dan Tekanan pada Mesin Diesel

Jurnal METTEK ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 39
Author(s):  
Nasmi Herlina Sari ◽  
Suteja Suteja ◽  
Yudi Ahmad Efendi
Keyword(s):  
The Other ◽  
Control Panel ◽  
Exhaust Gas ◽  
Engine Control ◽  
Pressure Measurements ◽  
Gas Temperature ◽  
Temperature And Pressure ◽  
Engine Components ◽  
Exhaust Gas Temperature ◽  
Temperature Side

Studi ini bertujuan untuk menganalisa temperatur, dan tekanan pada setiap komponen mesin Mesin diesel Sulzer 16 ZAV 40S selama beroperasi 8 jam. Penelitian ini dilakukan di PT. Iradat Aman Sektor Pringgabaya Lombok. Engine Control Panel (ECP) dan Generator Control Panel (GCP) telah digunakan untuk menentukan nilai dari tekanan, dan temperatur berdasarkan sensor yang telah dipasang pada komponen mesin. Pengukuran temperatur dan tekanan dilakukan setiap jam selama 8 jam. Hasil penelitian menunjukan bahwa setelah mesin beroperasi selama 4 jam sampai 7 jam; temperatur stator, temperatur gas buang, temperature silinder sisi A dan silider sisi B mengalami penurunan yang signifikan dikarenakan kebocoran pada silinder A dan B. Sedangkan tekanan pada mesin masih normal dan tidak mengalami perubahan yang signifikan. This study aims to analyze the temperature and pressure of each component of the Sulzer 16 ZAV 40S diesel engine for 8 hours of operation. This research was conducted at PT. Iradat Aman Sector Pringga Baya Lombok. The Engine Control Panel (ECP) and Generator Control Panel (GCP) have been used to determine the value of pressure and temperature based on sensors that have been installed on engine components. Temperature and pressure measurements were carried out every hour for 8 hours. The results showed that after the machine operated for 4 hours to 7 hours; stator temperature, exhaust gas temperature, cylinder temperature side A and side cylinder B experienced a significant decrease due to leaks in cylinders A and B. On the other hand, the pressure on the engine was still normal and did not experience a significant change.

scholarly journals АНАЛИТИЧЕСКОЕ ОПРЕДЕЛЕНИЕ ИСТИННОЙ УДЕЛЬНОЙ ИЗОБАРНОЙ ТЕПЛОЁМКОСТИ КОМПОНЕНТ ВОЗДУХА И ПРОДУКТОВ СГОРАНИЯ С УЧЁТОМ ВЛИЯНИЯ ТЕМПЕРАТУРЫ И ДАВЛЕНИЯ И ЭФФЕКТА ТЕРМИЧЕСКОЙ ДИССОЦИАЦИИ

2019 ◽  
pp. 4-17
Author(s):  
Майя Владимировна Амброжевич ◽  
Михаил Анатольевич Шевченко
Keyword(s):  
Heat Capacity ◽  
Gas Turbine ◽  
Pressure Ratio ◽  
Thermal Dissociation ◽  
Combustion Products ◽  
Heat Capacities ◽  
Isobaric Heat Capacity ◽  
Working Fluid ◽  
Gas Temperature ◽  
Temperature And Pressure

The basic thermophysical parameter of the working fluid of all thermal machines without exception is isobaric heat capacity (specific heat at constant pressure). Traditionally, in engineering calculations of isobaric heat capacity are determined as a tabular value for average heat capacities, or approximated with a square parabola within a given temperature range. Isobaric heat capacity is a function of temperature only. At the current level of GTE development, when the overall compressor pressure ratio is already up to 50 and the tendency of its increase remains it is unacceptable to neglect the pressure. However, the turbine inlet gas temperature also rises that will inevitably lead to the effect of thermal dissociation in the combustion products of the gas turbine engine. The studies of the thermal dissociation effect influence on the parameters of the working process of advanced GTE show that this ignoring leads to computational errors. At the present time, there are mathematical models that allow calculating the isobaric heat capacity as a function of temperature and pressure (taking into account the effect of thermal dissociation) but they are laborious, which is not always practical when estimate calculations performing and program algorithms writing. Consequently, the authors posed the problem of obtaining of simple analytic relationships that make it possible to calculate the isobaric heat capacity as a function of temperature and pressure (taking into account the effect of thermal dissociation). Based on the tabular data for the main components of the gas turbine combustion products within a given range of pressures and temperatures (nitrogen: p = 1 ... 200 bar, T = 150 ... 2870 K, oxygen: p = 1 ... 200 bar, T = 210 ... 2870 K, argon: p = 1 ... 200 bar, T = 190 ... 1300 K, the water vapor: p = 0.1 ... 200 bar, T = 640 ... 1250 K and p = 0.1 ... 400 bar and T = 1250 ... 3200 K, carbon dioxide: p = 1 ... 200 bar, T = 390 ... 2600 K), analytical dependencies were obtained for the calculation of isobaric heat capacities as functions of temperature and pressure taking into account the effect of thermal dissociation. The results of the calculations were compared with tabulated experimental data.

Droplet Vaporization in a High-Pressure Gas

1993 ◽  
Vol 115 (3) ◽  
pp. 699-706 ◽  
Author(s):  
J. P. Hartfield ◽  
P. V. Farrell
Keyword(s):  
High Pressure ◽  
Ambient Pressure ◽  
Life Time ◽  
Free Fall ◽  
Video Camera ◽  
Vaporization Rate ◽  
Gas Temperature ◽  
Droplet Vaporization ◽  
Ambient Gas ◽  
Temperature And Pressure

Evaporation of single, liquid droplets in a high-temperature, high-pressure gaseous environment has been investigated experimentally. The effects of gas temperature, pressure, and strength of naturally occurring convective flows were studied. Pure hydrocarbon (n-heptane) and trichlorotrifluoroethane (R-113) droplets were vaporized in a nitrogen atmosphere within a sealed chamber, which was developed to minimize forced convection. Experiments were carried out in normal and microgravity (~ 10−5 g) fields in order to examine the effect of natural convection. A single droplet was attached to the end of a quartz fiber. The gas temperature and pressure were raised quickly by a compressive process. The gas temperature and pressure were varied from 0.93<Tr<1.23 and 0.32<Pr<0.73. The droplet was located at the point of compressive symmetry. Droplet lifetime and instantaneous vaporization rate were determined from the data recorded by video camera. The results indicated that ambient gas temperature is a more significant parameter than ambient pressure for high-pressure droplet vaporization. This conclusion was based on comparisons of droplet vaporization rate for the range of temperatures and pressure tested. Ambient gas pressure was seen to have a weaker influence on vaporization rate. Removal of the gravity field during free-fall experiments resulted in an increase of droplet life time of about 30 percent for the case of R-113 liquid, and little change for the n-heptane droplets.

Cold Spray Characteristics of Commercially Pure Ti and Ti-6Al-4V

2010 ◽  
Vol 89-91 ◽  
pp. 639-644 ◽  
Author(s):  
Wilson Wong ◽  
Ahmad Rezaeian ◽  
Eric Irissou ◽  
Jean Gabriel Legoux ◽  
Steve Yue
Keyword(s):  
Traverse Speed ◽  
Deposition Efficiency ◽  
Average Particle ◽  
Gas Temperature ◽  
Porosity Level ◽  
Spray Process ◽  
Cold Gas Dynamic Spray ◽  
Gas Dynamic Spray ◽  
Temperature And Pressure ◽  
Cp Ti

Ti and Ti-6Al-4V coatings were deposited by cold gas dynamic spray process using nitrogen as propellant gas. For Ti, the inlet gas temperature and pressure were varied for two different powder morphologies in such a way that the average particle velocity ranged from ~600 to 850 m/s. In addition, the nozzle traverse speed was varied. For all conditions, the deposition efficiency, the porosity, and the microhardness were measured. It is shown that the porosity level decreased as the gas temperature and pressure increased, whereas the velocity, deposition efficiency, and microhardness increased. Furthermore, it is observed that a lower nozzle traverse speed engendered a softer coating. The coating adhesion on a grit 24 Al2O3 blasted mild steel surface was established to be greater than 78.8 MPa. In addition, a Ti-6Al-4V coating was produced and was determined to be slightly more porous compared to a CP Ti coating.

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