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Browse Dept. of Aerospace Engineering by Title
Now showing items 141-160 of 506
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(2012-02-06)Abstract Effect of fine graphite flake, carbon nanotube, and carbon nanofiber additives on the efficiency of an external gear pump driving an ethanol-based closed hydraulic loop was investigated experimentally. A number ...
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(2012-05-22)A boundary-element method (BEM) is used to compute axisymmetric acoustic fields in the gap between the radiating plate and reflector of a single-axis acoustic drop levitator, in order to better understand the dependence ...
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Effect of grain structure and doping on the mechanical properties of polysilicon thin films for MEMS (2014-01-16)Freestanding devices fabricated for Microelectromechanical Systems (MEMS) employ slender polysilicon flexures that are prone to failure due to large operating stresses. Polycrystalline silicon (polysilicon) films with ...
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(2013-05-24)The design of supersonic and hypersonic vehicles involves the challenging task of designing thin panels that can withstand severe unsteady pressure and thermal loads. A good understanding and accurate prediction of the ...
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(2012-12)The effect of heating on sound radiated by instability waves in a two-dimensional mixing layer is studied. A linear stability theory coupled with linearized Euler calculations are used to compute the amplitude of the ...
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(1995)An experimental study of the effects of large distributed roughness located near the leading-edge of an airfoil has been performed to determine the effect on boundary-layer development and transition. Boundary-layer ...
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(2014-01-16)The response of hypervelocity boundary layers to global mechanical distortions due to concave surface curvature is examined. Surface heat transfer, visual boundary layer thickness, and pressure sensitive paint (PSP) data ...
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(2015-01-21)The presented work investigates the mechanical response of the silver-copper eutectic system (Ag60Cu40, subscripts indicating atomic percent) linking material deformation to microstructural properties. The Ag60Cu40 material ...
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(2014-01-16)Shock wave/boundary-layer interactions (SWBLIs) are complex flow phenomena that are important in the design and performance of internal supersonic and transonic flow fields such as engine inlets. This investigation was ...
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(2001)The effects of simulated ice shape on the NLF 0414 were quite different from the NACA 23012m. There was little variation of lift when the simulated ice-shape location was varied from 2% to 20% chord. The large losses in ...
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(2003)Motion planning has become an increasingly important task as autonomy in mechanical systems has gained in popularity. Such systems must be able to plan new trajectories and controls reliably and rapidly in response to ...
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(2019-09-30)Modeling and predicting the transient behavior of higher dimensional nonlinear dynamical systems subject to Gaussian white noise excitation remains an open problem with broad application to nonlinear estimation, uncertainty ...
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(2004)A performance (delivered mass versus time of flight) estimation technique approximates the performance of different revolution ratio trajectories from a set of optimal trajectories using a linear least square fitting method. ...
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(2012-05-22)In 2004, a research partnership between the University of Illinois and CU Aerospace demonstrated the first electric discharge pumped oxygen-iodine laser referred to as ElectricOIL. This exciting improvement over the ...
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(2010-01-06)The mechanical and piezoelectric behavior of freestanding Lead Zirconate Titanate (PZT) composite films comprised of SiO2, Pt, PZT and Pt, for MEMS applications was investigated by microscale uniaxial tension experiments. ...
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(2017-06-14)Thin film piezoelectric materials with high piezoelectric coefficients such as PbZr0.52Ti0.48O3 (PZT) offer several advantages to microelectromechanical systems (MEMS) due to their low power requirements, large displacements, ...
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(2018-07-20)The supersonic separated flowfield aft of a blunt-faced cylinder aligned with the freestream is highly complex such that a technique able to identify instantaneous turbulent structure within it is valuable. In this study, ...
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Evaluation of Tungsten Hexachloride as a ROMP Active Catalyst Precursor for Self -Healing Polymers (2007)A drawback to current catalysts used in self-healing materials is the relatively low temperatures at which they deactivate. An advantage of WCl 6 is that the high melting temperature (Tm=275°C) allows for the use of ...
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Now showing items 141-160 of 506