Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 104 for “"Gas temperature"”.
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Gas temperature measurements by ultrasonic pulse method
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1955.
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Effect of gas temperature gradients on radiant heat transmission
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1955.
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Determining gas temperature from spectroscopic measurements in electric oxygen-iodine lasers
Gas temperature is a driving factor in the performance of electric oxygen-iodine lasers. Due to the importance of temperature, the gas temperature must be measured at different locations throughout the laser system. Problems with traditional measurement techniques have led to molecular spectroscopy …
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An evaluation of the use of thermocouples for gas temperature determination in an I.C. engine environment
The magnitude and transient nature of the gas temperature in the cylinder of an internal combustion engine makes the measurement quite difficult. Several techniques have been employed to try and determine the actual gas temperatures in internal combustion engines, and most of these have either …
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A quantitative study of the feasibility of oxygen laser induced fluorescence for engineering gas temperature measurements
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Particle Size, Gas Temperature, and Impingement Cooling Effects on High Pressure Turbine Deposition in Land Based Gas Turbines from Various Synfuels
… study the independent effects of particle size, gas temperature, and metal temperature on ash deposits from two candidate power turbine synfuels. The facility matches the gas temperature and velocity of modern first stage high pressure turbine vanes while accelerating the deposition process. This …
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Recombination in low temperature helium plasmas
… afterglows of plasmas produced in pure helium gas at atomic densities ~lo18 - lo19/cc . Qualitative observations were made at a gas temperature of 4.20K while most quantitative results were obtained at a gas temperature of 77 o K at a pressure of 9.5 Torr in a region of free electron densities …
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An experimental study and modeling of Transformer-Coupled Toroidal Plasma processing of materials
… bands of diatomic molecules such as N2, the temperatures of neutral gases were determined in the TCTP source. This was the first measurement of the neutral gas temperature of a high power density plasma in a toroidal geometry. An argon plasma was found to be around 2000K for a power density …
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Shock Wave Dispersion in Weakly Ionized Gas
… modification in non-equilibrium weakly ionized gases and to clarify the physical mechanisms of the shock wave modification process. The discharge was generated in 99.99% Ar at a gas pressure between 20 and 100 Torr and at a discharge power density less than 10.0 Watts/cm<sup>3</sup>. Power …
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Heat Transfer Characterization in Jet Flames Impinging on Flat Plates
… is computed from the measured heat flux and temperature data using a reference method and a slope method. The heat transfer coefficient (h) has a nearly bell shaped radial distribution at the plate surface for H/d =3.3. The value of h drops by 37 % from r/d =0 to r/d= 2. Upon increasing the …
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Development of 0 – D argon collisional radiative model conjoined with optical emission spectroscopy for radio frequency plasma
… elemental and excitation or ionization levels of gases in plasma. Thus, this project aims to develop a global argon collisional radiative model (CRM) coupled with optical emission spectroscopy (OES) for various pressures. The model considers various argon states such as Arg, Ar4s, Ar4p, Ar3d, …
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Separation of the Heat Transfer Components for Diffusion Flames Impinging onto Ceilings
… the first series of experiments, measurements of gas temperature and velocity were made at 76 mm vertical intervals above the burner up to the ceiling. Fire heat release rates (HRRs) of 50 kW and 90 kW with free flame length to ceiling height ratios, Lf/H, of 2, 1.5, 1, 0.8, 0.85 were used to …
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An Approach to Thermocouple Temperature Measurements that Reduces Uncertainties Associated with Radiative Corrections
<p>Obtaining accurate temperature measurements in flame environments with thermocouples is extremely challenging due to the effects of radiative heat loss. These losses are difficult to quantify and often cannot be corrected for or minimized without sacrificing spatial resolution. In this work, a …
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Measurements of fission product sorption on graphite
Nuclear source estimations for high and very high gas temperature reactors (VHTRs) require data for fission product (FP) adsorption on graphite at high temperatures. The adsorption and vapor pressures of silver on nuclear moderator grade IG-110 graphite were measured in the range of 1000-1400K. …
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Simulation of Flowing Plasma Discharges With Applications to Lasers, Fuel Cells, and Microthrusters
… Ar (at 10s Torr), and the incremental velocity, gas temperature, and thrust are studied. Due to the large surface-to-volume ratio and low Reynolds number, heat conduction to the walls and viscous losses play a significant role in determining thrust. Geometrical parameters like nozzle length and …
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Application of synthetic molecular sieve zeolites and silica gel towards the separation of sulfur dioxide from combustion gases
… as contacting media in a process for combustion gas desulfurization was performed. Linde Synthetic Molecular Sieves types 13X and AW500 and Davison Silica Gel were the materials studied. The motivation for this investigation was based on the premise that a suitable method for removing sulfur …
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Determination of Flame Dynamics for Unsteady Combustion Systems using Tunable Diode Laser Absorption Spectroscopy
… allows a dynamic measurement of the product gas temperature. The response in product gas temperature directly relates to the enthalpy fluctuations that couple to the acoustics. Experimental frequency response functions of a laminar, flat-flame burner and a turbulent, swirl-stabilized …
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Modeling of Atmospheric Pressure Plasma Processing of Gases and Surfaces
… amounts of O3 and NxOy are generated in the gas phase. Increasing the relative humidity results in decreased production of O3 and increased concentrations of peroxy and acid groups on the surface. Increasing the gas temperature increases the surface concentration of peroxy radicals and …
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An investigation of residual fuel oil ash deposit formation and removal in cooled gas turbine nozzles
… throat area, determined using the calculated gas flow rates, turbine nozzle inlet temperature, and the measured combustion chamber pressure. The parameters varied in the test program, other than the nozzle sectors, were the gas temperature and the gas pressure. The gas pressure variations …
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