Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Analog Derivative (1)
- Analog Filter (1)
- Analog Sensor (1)
- Bulk-metallic glasses (1)
- Droplet characterization (1)
-
- Droplets (1)
- Engine Performance (1)
- Equivalent diameter (1)
- Fatigue behavior (1)
- Four-point bend (1)
- Free-jet (1)
- Ground Test (1)
- Hypersonics (1)
- Inverse Heat Transfer (1)
- Optical measurement (1)
- Ramjet (1)
- Rate Sensor (1)
- Shear band spacing (1)
- Size effects (1)
- Steam turbine (1)
- Steam turbine cascade (1)
- Three-point bend (1)
- Uncertainty (1)
Articles 1 - 4 of 4
Full-Text Articles in Mechanical Engineering
Heat Transfer Analysis Via Rate Based Sensors, Jake Erik Plewa
Heat Transfer Analysis Via Rate Based Sensors, Jake Erik Plewa
Masters Theses
This work presents an integrated rate-based sensor and method for resolving the surface heat flux of a fundamental inverse heat conduction problem without numerical regularization or differentiation in a semi-infinite geometry that additionally accounts for thermocouple delay due to its intrinsic time constant. The sensor uses well-designed analog filters to directly regularize raw voltage data to eliminate the need for numerical regularization methods. The sensor can also be used in a series of well-designed voltage-rate interfaces that directly measure the voltages from in-depth thermocouples, which are used in conjunction with the thermocouple calibration curve to provide higher-time derivatives of the …
Test Size And Volume Effects On Fatigue Behavior Of Bulk Metallic Glasses (Bmgs), Qingming Feng
Test Size And Volume Effects On Fatigue Behavior Of Bulk Metallic Glasses (Bmgs), Qingming Feng
Masters Theses
As a potential structural material, performance of bulk metallic glasses (BMGs) under cyclic loading is critical in applications. Among the mechanical properties of metallic glasses, the fatigue behavior received less attention and is not well understood. BMGs exhibit significant size effects on the mechanical behavior under monotonic loading, such as compression, tension, and bending. At the same time, different test-volume could lead to a distinct difference in the mechanical behavior of BMGs.
The fatigue behavior of the Zr52.5Cu17.9Ni14.6Al10.0Ti5.0 [atomic percent (at. %)] BMG alloy (Vitreloy 105) with different sizes has been …
Droplet Characterization In The Wake Of Steam Turbine Cascades, Adam Charles Plondke
Droplet Characterization In The Wake Of Steam Turbine Cascades, Adam Charles Plondke
Masters Theses
In low-pressure steam turbines, water droplet formation on the surfaces of stationary stator blades can lead to erosion on downstream turbine blades and other equipment. One property that affects the size of the droplets that are formed is the adhesive forces between the water and the surface of the stator blade. The adhesive forces hold the droplets to the surface where they may combine, forming increasingly larger droplets. Eventually, the aerodynamic forces will tear the droplets off the surface, carrying them downstream.
To study the effect of stator surface properties on the droplet size distribution, four cascades of stator blades …
A Method For Performance Analysis Of A Ramjet Engine In A Free-Jet Test Facility And Analysis Of Performance Uncertainty Contributors, Kevin Raymond Holst
A Method For Performance Analysis Of A Ramjet Engine In A Free-Jet Test Facility And Analysis Of Performance Uncertainty Contributors, Kevin Raymond Holst
Masters Theses
Ramjet and scramjet engines are being developed to provide a more fuel efficient means of propulsion at high Mach numbers. Part of the development of these engines involves test and evaluation of an engine in ground facilities as well as in flight. Ground facilities, like Arnold Engineering Development Center (AEDC) and those at engine manufacturers like General Electric (GE) and Pratt & Whitney (PW), have decades of experience testing traditional turbine engines and much less experience testing full scale ramjet engines.
Testing a supersonic engine model in a free-jet mode presents a host of challenges not experienced during traditional direct …