Performance of arcjet-type atomic-oxygen generator by laser absorption spectroscopy and CFD analysis

Matsui, Makoto; Takayanagi, Hideaki; Oda, Y.; Komurasaki, Kimiya; Arakawa, Yoshihiro

doi:10.1016/j.vacuum.2003.12.046

Cited by 32 publications

(16 citation statements)

References 4 publications

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“…The potential of CFD extends into many disciplines, and has been validated in various research studies, ranging from oxygen generation [23], thermal comfort in buildings [24] and atmospheric simulations [25]. The level of precision in the simulation varies depending on the level of refinement in the model discretisation, and the more refined the model, the longer the simulation times.…”

Section: Cfd Tool -Ansys Fluent®mentioning

confidence: 99%

Coupled TRNSYS-CFD simulations evaluating the performance of PCM plate heat exchangers in an airport terminal building displacement conditioning system

Gowreesunker

Tassou

Kolokotroni

2013

Building and Environment

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This paper reports on the energy performance evaluation of a displacement ventilation (DV) system in an airport departure hall, with a conventional DV diffuser and a diffuser retrofitted with a phase change material storage heat exchanger (PCM-HX). A TRNSYS-CFD quasi-dynamic coupled simulation method was employed for the analysis, whereby TRNSYS® simulates the HVAC and PID control system and ANSYS FLUENT® is used to simulate the airflow inside the airport terminal space. The PCM-HX is also simulated in CFD, and is integrated into the overall model as a secondary coupled component in the TRNSYS interface. Different night charging strategies of the PCM-HX were investigated and compared with the conventional DV diffuser. The results show that: i) the displacement ventilation system is more efficient for cooling than heating a space; ii) the addition of a PCM-HX system reduces the heating energy requirements during the intermediate and summer periods for specific night charging strategies, whereas winter heating energy remains unaffected; iii) the PCM-HX reduces cooling energy requirements, and; iv) maximum energy savings of 34% are possible with the deployment of PCM-HX retrofitted DV diffuser.

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Section: Cfd Tool -Ansys Fluent®mentioning

confidence: 99%

Coupled TRNSYS-CFD simulations evaluating the performance of PCM plate heat exchangers in an airport terminal building displacement conditioning system

Gowreesunker

Tassou

Kolokotroni

2013

Building and Environment

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“…3,4) The relationship between laser intensity and absorption coefficient is expressed by the Beer-Lambert law as…”

Section: Principle Of Laser Absorption Spectroscopymentioning

confidence: 99%

“…Arc-heaters are widely used to generate such high enthalpy flows because of their long operational time, simple structure and ease of maintenance. [1][2][3][4] However, surface catalytic effects and active and passive oxidation of TPS materials have been recognized as important issues [5][6][7][8] ; erosion of their electrodes poses an important obstacle because polluted flows make it difficult to evaluate chemical reaction rates in front of TPS surfaces.…”

Section: Introductionmentioning

confidence: 99%

Operation Characteristics of Laser Driven Plasma Wind Tunnel

Matsui

Shinmi

Ueno

et al. 2009

Trans. JSASS Space Tech. Japan

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A laser driven plasma wind tunnel using a 2 kW class continuous wave laser was developed as a high speed and high density atomic oxygen generator. Firstly, its operation conditions were examined. Using argon and oxygen as working gases, laser sustained plasma (LSP) was successfully produced in the plenum pressure range from 0.30 MPa to 0.95 MPa, and then the LSP was expanded to the vacuum chamber through the convergent-divergent nozzle. Next, plume characteristics were evaluated by Pitot probe and laser absorption spectroscopy using an absorption line of ArI 772.38 nm. As a result, the Mach number and the specific enthalpy around the center were 5.0 to 6.5 and 3.0 MJ/kg to 5.2 MJ/kg, respectively. The maximum flux density of atomic oxygen was estimated as 2.2×10 21 cm -2 s -1 .

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“…Matsui et.al. have applied LAS to some high-enthalpy flow generators; PWK3 (IRS), IPG3 (IRS), 20 kW-Arc-heater (JUTEM), and 1.2 kW-Arcjet (University of Tokyo) 15 .…”

Section: A Laser Absorption Spectroscopymentioning

confidence: 99%

Effects of Swirl Flow on an Atmospheric Inductively Coupled Plasma

Inoue

Matsui

Takayanagi

et al. 2005

36th AIAA Plasmadynamics and Lasers Conference

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An atmospheric inductively coupled plasma is expected to be used in the development of the thermal protection system for Venus missions. In this study effects of the swirl flow injection on the characteristics of an atmospheric ICP generator were investigated. The total enthalpy was measured by two ways; the sonic flow method and calorimetric method. A diode laser absorption spectroscopy was also applied to the measurement of the temperature and velocity of an extracted plume. The stagnation pressure was about 60 kPa and the work gas was argon. The experimental found that the specific enthalpy increased with decreasing the swirl flow fraction. This seems to arise from the change in the shape and the flow pattern inside the plasmas.

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Performance of arcjet-type atomic-oxygen generator by laser absorption spectroscopy and CFD analysis

Cited by 32 publications

References 4 publications

Coupled TRNSYS-CFD simulations evaluating the performance of PCM plate heat exchangers in an airport terminal building displacement conditioning system

Coupled TRNSYS-CFD simulations evaluating the performance of PCM plate heat exchangers in an airport terminal building displacement conditioning system

Operation Characteristics of Laser Driven Plasma Wind Tunnel

Effects of Swirl Flow on an Atmospheric Inductively Coupled Plasma

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