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.
Results
Showing 1 to 20 of 58 for “"Total Temperature"”.
-
Computational Modeling of Total Temperature Probes
… of CFD as a tool in the design and analysis of total temperature probes. Simulations were completed using 2D axisymmetric and 3D geometry of stagnation total temperature probes using ANSYS Fluent. The geometric effects explored include comparisons of shielded and unshielded probes, the effect of …
-
Computational Modeling of Radiation Effects on Total Temperature Probes
The requirement for accurate total temperature measurements in gaseous flows was first recognized many years ago by engineers working on the development of superchargers and combustion diagnostics. A standard temperature sensor for high temperature applications was and remains to be the …
-
A Low Order Aerodynamic Model of Embedded Total Temperature Probes
Measurement of the total conditions downstream of fans is of primary importance to aeroengine development. Historically, these measurements have been acquired with the use of traditional total condition probes mounted to the guidevanes or engine cowling; however, such a setup can have significant …
-
An Experimental Conduction Error Calibration Procedure for Cooled Total Temperature Probes
The accurate measurement of total temperature in engine diagnostics is a challenging task which is subject to several sources of error. Conduction error is predominant among these sources since total temperature sensors are embedded into a cooled strut for measurement. This study seeks to …
-
Mount Interference and Flow Angle Impacts on Unshielded Total Temperature Probes
Accurately measuring the total temperature of a high-speed fluid flow is a challenging task that is required in many research areas and industry applications. The difficulty in total temperature measurement generally stems from attempting to minimize measurement error or accurately predict error so …
-
Total Temperature Probe Performance for Subsonic Flows using Mixed Fidelity Modeling
An accurate measurement of total temperature in turbomachinery flows remains critical for component life models and cycle performance optimization. While many techniques exist to measure these flows, immersed thermocouple based probes remain highly desirable due to well established practices for …
-
Total temperature separation in a Kármán vortex street with finite vortex cores
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
-
A Computational Study of Compressor Inlet Boundary Conditions with Total Temperature Distortions
… from the investigation indicate that both total pressure and velocity boundary conditions at the compressor face are made non-uniform by the upstream thermal distortion, while static pressure remains nearly constant. Total pressure at the compressor face was found to vary on the order of …
-
Impact of Total Temperature Probe of Geometry on Sensor Flow and Heat Transfer
The measurement of temperature in hot gases plays an important role in many engineering applications, such as the efficiency and performance of an engine. As such, understanding the accuracy of these temperature measurements is also important. One of the common ways in which temperature is measured …
-
The Turbulence Structure of Heated Supersonic Jets with Offset Total Temperature Non-Uniformities
… in radiated noise. To investigate the impact of temperature on the turbulence development in the jet, spatially resolved three-component velocity vectors were acquired using particle image velocimetry (PIV) performed on two small-scale perfectly expanded Mach 1.5 jet flows, one with a uniform …
-
Time-resolved stagnation temperature and pressure measurements in the vortex street behind a cylinder
… revealed the prospect that the instantaneous total temperature is nonuniform around vortices. For low Mach number flows, the instantaneous total pressure was also shown to become nonuniform in such a similar manner that the near-wake patterns of instantaneous total pressure exhibit almost …
-
Measurements of pressure and thermal wakes in a transonic turbine cascade
The effects of freestream turbulence on the total pressure and total temperature in the wake of a cooled transonic turbine cascade with heated flow are presented in this thesis. The experiment was conducted in the Virginia Tech Cascade Wind Tunnel. A dual hot wire aspirating probe was used to make …
-
The Effect of Thermal Non-Uniformity on Coherent Structures in Supersonic Free Jets
… the engine and nozzle. Prior work has shown that total temperature non-uniformity is a noise reduction technique which introduces a stream of cold flow into the heated jet. This method has been shown to cause changes in the exhaust plume and result in a 2±0.5 dB reduction of peak sound pressure …
-
Design and operation of a counter-rotating aspirated compressor blowdown test facility
… designs enabled efficiency estimates through total temperature and total pressure measurements. The facility was designed to provide at least 100 ms of available test time, approximately a factor of five greater than previous blowdown compressor facilities. The adiabatic core efficiency of the …
-
The measurement of wind tunnel flow quality at transonic speeds
… associated with the velocity, density, and total temperature. Implementing thermodynamic and kinematic equations, new methods for expanding the measured velocity, density, and total temperature fluctuations to obtain additional fluctuations are investigated. The derived static pressure …
-
Aerodynamic performance measurements in a counter-rotating aspirated compressor
… the efficiency of this unique machine, the total temperature as well as the total and the static pressures at the inlet and the outlet of the compressor are measured. Due to the short test time ([approx.]100 ms) and unsteady nature of the blow-down environment, performance measurements in a …
-
Turbulence measurements of heated supersonic slot injection into a supersonic stream
… time intervals. The Mach 3 main stream had a total pressure of 95 psia and a Re/cm of 2 x 10⁶. The Mach 1.7 secondary stream was injected parallel to the main flow at 10.7 psia, resulting in a slightly overexpanded flow. The injection slot had a height of 1.2 cm. The flow was monitored at four …
-
A three-dimensional turbine engine analysis compressor code (TEACC) for steady-state inlet distortion
… predict the magnitude and shape of exit total temperature and exit total pressure in the distorted region. TEACC calculated the overall character of exit total pressure and exit total temperature in the nondistorted region, identifying the location of the largest value just after the …
-
IMPACT OF NEW CHEVRON CONFIGURATIONS ON MIXING ENHANCEMENT IN SUBSONIC JETS
… a contemporary subsonic aircraft. The fan nozzle total pressure is set to 1.8 atm while the core nozzle total pressure is 1.65 atm. The total temperature inside the fan nozzle is set to 333.3 K while the core nozzle has a total temperature of 833.3 K. The freestream conditions are given as: static …
-
Modeling and Testing of Fast Response, Fiber-Optic Temperature Sensors
… analyze and test a fast response fiber-optic temperature probe and sensor. The sensor is intended for measuring rapid temperature changes such as produced by a blast wave formed by a detonation. This work was performed in coordination with Luna Innovations Incorporated, and the design is based …
Page 1 of 3