نتایج جستجو برای: cfd simulation of diffuser
تعداد نتایج: 21191970 فیلتر نتایج به سال:
The increased performance of close series stacked tube axial fans due to the introduction of a diffuser element between the primary and secondary fan is investigated in this paper. Experimental results showed that there was a 15% increase on average in the performance of two stacked Delta FFB0412VHN 40 mm fans across their operating range when a diffuser element was introduced between the two f...
this thesis is presented 10 ghz voltage controlled ring oscillator for high speed application. the voltage controlled ring oscillator was designed and fabricated in 0.13یm cmos technology. the oscillator is 7-stages ring oscillator with one inverter replaced by nand-gate for shutting down in the ring oscillator during idle mode. tri-state inverter was used to control of 126 bit vector in ri...
reinsurance is widely recognized as an important instrument in the capital management of an insurance company as well as its risk management tool. this thesis is intended to determine premium rates for different types of reinsurance policies. also, given the fact that the reinsurance coverage of every company depends upon its reserves, so different types of reserves and the method of their calc...
Stability against capsizing is one of the most fundamental requirements to design a ship. In this research, for the first time, CFD is performed to predict main modes of capsizing. CFD first is conducted to predict parametric rolling for a naval ship. Then CFD study of parametric rolling is extended for prediction of broaching both by using CFD as input to NDA model of broaching in replacement ...
This paper presents validation and assessment of ducted propellers for aircraft propulsion. Numerical methods simulation strategies are put forward, including steady/unsteady high-fidelity computational fluid dynamics (CFD) simulations simpler momentum-based methods. The comparisons the made using a propeller proposed by NASA. Simulations also performed analyzed at extended advance ratios, blad...
Six-stage centrifugal pumps are used in deep-sea mining lifting systems and required to convey slurry containing coarse particles. A six-stage pump suitable for operation a natural system was manufactured. High-flow full-scaled conveying experiments at 5% 9% volume concentration of particles carried out large modified test site with artificial nodules. CFD-DEM simulations were obtain transport ...
power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...
As part of ASHRAE Research Project 1185, field data from the constant flow rate charging of a stratified chilled water storage tank with double-ring octagonal slotted-pipe diffusers serving a university chilled water system were compared with results of a transient axisymmetric computational fluid dynamics (CFD) model. Charge processes at flows near design flow rate and 50% of design were model...
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