Results 261 to 270 of about 79,452 (304)
Some of the next articles are maybe not open access.
What Controls the Entrainment Rate of Dry Buoyant Thermals with Varying Initial Aspect Ratio?
Journal of the Atmospheric Sciences, 2023Abstract This study uses theory and numerical simulations to analyze the nondimensional spreading rate α (change in radius with height) of buoyant thermals as they rise and entrain surrounding environmental fluid. A focus is on how α varies with initial thermal aspect ratio Ar, defined as height divided by width of the initial buoyancy perturbation. An
Hugh Morrison +3 more
openaire +1 more source
Vortex induction and mass entrainment in a small-aspect-ratio elliptic jet
Journal of Fluid Mechanics, 1987A passive technique of increasing entrainment was found by using a small-aspect-ratio elliptic jet. The entrainment ratio of an elliptic jet was several times greater than that of a circular jet or a plane jet. The self-induction of the asymmetric coherent structure caused azimuthal distortions which were responsible for engulfing large amounts of ...
Chih-Ming Ho, Ephraim Gutmark
openaire +1 more source
Entrainment ratio and entropy generation of vacuum-objective supersonic ejectors
2021Supersonic air ejectors are mechanical devices in which a supersonic primary air stream entrains a secondary air stream by creating suction. Because of their ability to use low-grade energy for their operation and the absence of moving parts, these ejectors are used in various sectors such as refrigeration and fluid transportation.
openaire +1 more source
Development of the Technique for Calculating the Ejectors with Low Entrainment Ratios
Russian Aeronautics, 2018This paper presents the results of an investigation of ejectors with the low entrainment ratio. A technique for calculating the ejectors with a curvilinear axis has been developed. Comparative studies of the performance characteristics of ejectors with the rectilinear axis of the mixing chamber and the curvilinear initial section of the mixing chamber ...
R. R. Khaliulin +2 more
openaire +1 more source
A one dimensional model for the determination of an ejector entrainment ratio
International Journal of Refrigeration, 2012Abstract The proposed model is a new approach for the evaluation of the entrainment ratio of double choked ejectors, based on a perturbation procedure of linearized and axisymmetric supersonic flow. The model is developed in three regions: (i) the primary flow nozzle, (ii) the secondary flow channel, and (iii) the region of interaction between the ...
Javier García del Valle +3 more
openaire +1 more source
The Influence of Entrainment on Distribution Ratios in Complexation Studies
Solvent Extraction and Ion Exchange, 2019ABSTRACTEntrainment of a small amount of one phase in the other after phase separation is almost impossible to avoid in solvent extraction.
openaire +1 more source
Development of a large-entrainment-ratio axisymmetric supersonic ejector for micro butane combustor
Journal of Micromechanics and Microengineering, 2006A large-entrainment-ratio micro ejector has been developed to supply fuel–air mixture for a micro butane combustor. As a key component of the ejector, an axisymmetric convergent–divergent supersonic nozzle having a throat diameter of 42 µm is fabricated with high-precision electro-discharge machining.
Yong Fan, Yuji Suzuki, Nobuhide Kasagi
openaire +1 more source
A Novel Method to Measure the Air Entrainment Ratio of an Active Chilled Beam
International Journal of Ventilation, 2009AbstractThis paper presents a new simplified method to measure the air entrainment ratio of an active chilled beam or induction unit. The method uses a single anemometer and a simple purpose built measurement venturi together with the primary airflow rate. The new method is described and its calibration procedure is explained.
Mika Ruponen, John A Tinker
openaire +1 more source
Effect of CaO/Fe2O3 ratio on slag viscosity behavior under entrained flow gasification conditions
Fuel, 2019Abstract The key factor for smooth slag tapping of entrained flow gasifiers was slag viscosity behavior. Shanxi coals can’t meet the requirement for discharging slag due to its high SiO2 + Al2O3 contents. The single fluxing agent (CaO or Fe2O3) was also inoperative for Shanxi coals.
Zefeng Ge +10 more
openaire +1 more source
Experimental Study of Entrainment Ratio of the Near Exit Region of High-Speed Jets
Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B, 2011The growth of volcanic plumes is highly dependent on entrainment ratio, which is a ratio of the radial mass inflow to a jet to its axial mass flow. This fraction is relatively constant in many conditions, and its magnitude is a factor in whether a volcanic column either becomes buoyant and rises or collapses.
Farhad Saffaraval, Stephen A. Solovitz
openaire +1 more source