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 159 for “"serpentine"”.
-
Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets
… which require boundary layer ingesting (BLI) serpentine inlets to provide the needed air ow to the engine. These inlets produce distorted flow profiles that can cause aeromechanical, stability, and performance changes in embedded engines. Proper design of embedded engine systems requires …
-
Finite element analysis of automotive serpentine belt operation and failure
… operation and failure of automotive accessory serpentine belt using finite element analysis"--Abstract, page iv.
-
Serpentine and associated rocks and contact minerals near Westfield, Massachusetts
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology, 1960.
-
Active Flow Control of a Boundary Layer Ingesting Serpentine Diffuser
The use of serpentine boundary layer ingesting (BLI) diffusers offers a significant benefit to the performance of Blended Wing Body aircraft. However, the inherent diffuser geometry combined with a thick ingested boundary layer creates strong secondary flows that lead to severe flow distortion at …
-
Non-Intrusive Sensing and Feedback Control of Serpentine Inlet Flow Distortion
… total pressure distortion intensity found in serpentine inlet airflow was established using wall-pressure fluctuation measurements. This sensing technique was experimentally developed for aircraft with serpentine inlets in a symmetric, level flight condition. The turbulence carried by the …
-
Boundary Layer Control and Wall-Pressure Fluctuations in a Serpentine Inlet
… and engine stability were examined in a compact, serpentine inlet exhibiting flow separation. A 1/14-scale turbofan engine simulator provided the flow through the inlet. The inlet's mass flow was measured to be 759 scfm (0.939 lbm/s) with an average throat Mach number of 0.23 when the simulator …
-
Design and Fabrication of Electrostatically Actuated Serpentine-Hinged Nickel-Phosphorous Micromirror Devices
… and modeled using FEA software, which found that serpentine-hinged devices require approximately 33% of the actuation force of their straight-beamed counterparts. An aqueous electroless plating solution composed of nickel acetate, sodium hypophosphite, citric acid, ammonium acetate, and Triton …
-
Novel Legged Robots with a Serpentine Robotic Tail: Modeling, Control, and Implementations
… particular, this research focuses on animal-like serpentine tail structure, due to its larger workspace and higher dexterity. The overall research approach consists of two branches: a theoretical branch that focuses on dynamic modeling, analysis, and control of the legged robots with a serpentine …
-
Computational and experimental determination of the mixing efficiency of a microfluidic serpentine micromixer
… depth and 700um in width. These channels have a serpentine design with three loops. It was been analyzed that by increasing the depth of the channel to 400um at 0.1ul/min flow rate, 99.5% mixing efficiency was obtained. As both the contact area and time were increasing, which in turn lead to the …
-
A Systematic Design Methodology for Articulated Serpentine Robotic Tails to Assist Agile Robot Behaviors
… and implementation of an articulated serpentine robotic tail. Numerous serpentine tail prototypes have been designed and tested; however, they have not yet been integrated with a mobile base. The main challenges preventing the incorporation of serpentine tails with mobile bases …
-
Growth responses of selected plant species on serpentine soil of the western Sierra Nevada foothills
… responses of various annual plant species on serpentine and non-serpentine soils from the Sierra Nevada foothills and the adjacent area. Various measurements were taken at intervals during the life cycle to determine the comparative growth patterns on different types of soil. These …
-
THE SERPENTINE WALL: JUDICIAL DECISION-MAKING IN SUPREME COURT CASES INVOLVING AID TO SECTARIAN SCHOOLS
<p>This dissertation uses the cases involving aid to sectarian schools, decided between 1945 and 1985, as a vehicle for examining decision making by the Supreme Court justices. The discussion of Everson v. Board of Education (1947) relies heavily on the private papers of individual justices, …
-
Design Space and Motion Development for a Pole Climbing Serpentine Robot Featuring Actuated Universal Joints
… maintenance in place of humans. In this work, a serpentine robotic system is developed that will be able to climb pole-like structures, such as scaffolding and trusses, commonly found on work sites. Serpentine robots have been proven to be effective at traversing unstructured terrains and …
-
Three dimensional thermal modelling of high temperature proton exchange membrane fuel cells in a serpentine design
The aim of my work is to model a segment of a unit cell of a fuel cell stack using numerical methods which is classified as computational fluid dynamics and implementing the work in a commercial computational fluid dynamics package, FLUENT. The focus of my work is to study the thermal distribution …
-
How Are Rare Species Maintained?: Reproductive Barriers Between Layia jonesii, a Rare Serpentine Endemic, and L. platyglossa
… jonesii</em>, a rare San Luis Obispo County serpentine endemic, and <em>L. platyglossa, </em>a common coastal species,<em> </em>co-occur on serpentine derived hillsides and are interfertile. At these locations, <em>L. jonesii</em> is isolated to dry soils near serpentine rock outcrops and …
-
Effectiveness of a Serpentine Inlet Duct Flow Control Scheme at Design and Off-Design Simulated Flight Conditions
… test facility to determine the flow quality of a serpentine inlet duct incorporating active flow control for several simulated flight conditions. The total pressure distortion at the aerodynamic interface plane (AIP) was then used to predict the resulting stability for a compression system. This …
Page 1 of 8