Browsing by Title
Now showing items 2405-2424 of 10415
-
Experimental evaluation of pressure drop elements and fabricated nucleation sites for stabilizing flow boiling in minichannels and microchannels
(American society of mechanical engineers (ASME), 2005-06)The flow boiling process suffers from severe instabilities induced due to nucleation of vapor bubbles in a minichannel or a microchannel in a superheated liquid environment. In an effort to improve the flow boiling ... -
Experimental high power plasma-filled backward wave oscillator results
(Institute of Electrical and Electronics Engineers, 1988-06) -
An Experimental investigation of flow boiling characteristics of water in parallel microchannels
(American Society of Mechanical Engineers, 2004-08)Microchannels are being considered in many advanced heat transfer applications including automotive and stationary fuel cells as well as electronics cooling. However, there are a number of fundamental issues from the ... -
Experimental investigation of the resistance in thin superconducting films of niobium-germanium
(American Institute of Physics, 1980-01-15)We discuss the resistance of thin superconducting films of amorphous niobium-germanium below the BCS thermodynamic transition temperature as determined by measurements of the heat capacity. This resistance is shown to be ... -
An Experimental investigation on flow boiling of ethylene-glycol / water mixtures
(American Society of Mechanical Engineers, 2003-04)Mixtures of ethylene glycol and water are used in cooling the engines in automotive applications. Heat is transferred essentially under subcooled flow boiling conditions as the mixture flows over the hot surfaces, which ... -
Experimental point spread function of FM pulse imaging scheme
(Elsevier, 1995)In this paper, we have examined the possibility of incorporating pulse compression techniques into a conventional medical B-scan imaging scheme. Linear frequency modulation fm, one form of pulse coding among many others, ... -
Experimental realization of millimeter-wave amplification by a sheet beam free electron laser
(American Institute of Physics, 1994-03-14)We report an observation of millimeter-wave (94 GHz) amplification in a sheet beam, short period, planar wiggler: free electron laser amplifier. The observed gain is about 5 dB for a 530 keV, 4 A beam through a 54 cm ... -
Experimental studies of heavy ion collection acceleration at the University of Maryland
(IEEE, 1979-06)The collective acceleration of ions (H,C,N) from a well-localized ion source immediately downstream of a relativistic electron beam diode is experimentally investigated, The ions are produced either in a wellconfined gas ... -
Experimental studies of high power plasma filled backward wave oscillators
(IEEE, 1990-05-21)Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation ... -
Experimental studies of high-power microwave reflection, transmission, and absorption from a plasma-covered plane conducting boundary
(The American Institute of Physics, 1991-05-01)Experimental studies of the reflection, transmission, and absorption of high-power microwave pulses from a plasma-covered plane conducting boundary are presented. Under optimum conditions, backscattered rf power is ... -
Experimental studies of overmoded relativistic backward-wave oscillators
(Institute of Electrical and Electronics Engineers, 1998-06)Internal field-emission breakdown in the electrodynamic structures of high-power microwave (HPM) devices can seriously limit the device’s output power and pulse duration. Increasing the diameter of the electrodynamic ... -
Experimental studies of the laser controlled collective ion accelerator
(Copyright 1989 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics., 1989-10-01)Detailed experimental studies of a collective acceleration experiment in which a time sequenced laser-generated ionization channel is used to control the propagation of an intense relativistic electron bearnfront are ... -
Experimental study of collective acceleration of ions from a localized gas cloud
(American Institute of Physics, 1981-02)The collective acceleration of ions (H, D, He, N, Ne; Ar, Kr, Xe) to peak energies of about 5 MeV/nucleon has been achieved using a 1.5-MeV, 35-kA, 30-ns electron beam pulse. Ion energies have been measured using ... -
Experimental study of flow patterns, pressure drop and flow instabilities in parallel rectangular minichannels
(American Society of Mechanical Engineers (ASME), 2004-06)The use of phase change heat transfer in parallel minichannels and microchannels is one of the solutions proposed for cooling high heat flux systems. The increase in pressure drop in a two phase system is one of the problems, ... -
Experimental study of flow patterns, pressure drop, and flow instabilities in parallel rectangular minichannels
(Taylor & Francis, 2005)Flow boiling heat transfer in parallel minichannels and microchannels is one of the solutions proposed for cooling high heat flux systems. The associated increase in the pressure drop poses a problem that needs to be ... -
Experimental study of heat transfer in an evaporating meniscus on a moving heated surface
(American Society of Mechanical Engineers, 2005-03)A stable meniscus is formed by a circular nozzle dispensing water over a heated circular face of a rotating cylindrical copper block. The nozzle is offset from the axis of rotation of the copper block and thus a moving ... -
Experimental study of heat transfer, pressure drop, and dryout for flow boiling of water in an oil heated minichannel
(American Society of Mechanical Engineers (ASME), 2004-06)Heat transfer and pressure drop, are experimentally recorded for flow boiling water in a single 706 mm circular copper channel 158.75 mm long. Heat is supplied by heat transfer oil at specified temperatures to a helical ... -
Experimental study of millimeter wave radiation from a rotating electron beam in a rippled magnetic field
(American Institute of Physics, 1985-06)The generation of millimeter wave radiation from the interaction of a rotating electron beam (2 MeV, I kA, 5 nsec) with an azimuthally periodic wiggler magnetic field has been studied experimentally. Calculations of the ...