Results 21 to 30 of about 290,148 (203)

Numerical Investigation of Flow Characteristics in a Centrifugal Pump Impeller with Sinusoidal Flow Rates of Different Oscillation Amplitudes [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2022
This study describes the large eddy simulations of a centrifugal pump impeller considering a sinusoidal flow rate and a constant rotation speed. Five different oscillation amplitudes of flow rate (A = 0.1Qd, 0.15Qd, 0.2Qd, 0.25Qd, and 0.3Qd, Qd indicates
Y. Li, W. Zhang, X. Chen
doaj   +1 more source

A mechanism for high-frequency oscillation in ramjet combustors and afterburners [PDF]

open access: yes, 1956
An experimental investigation was made of the behavior of a small two-dimensional combustion chamber, burning a uniform mixture of air and fuel vapor under conditions of high-frequency oscillation or screech.
Marble, Frank E., Rogers, Don E.
core   +1 more source

Effect of fuel-air mixture dilution on knock intensity (2nd report: Auto-ignition conditions in end gas preventing intense pressure oscillation)

open access: yesNihon Kikai Gakkai ronbunshu, 2017
This paper studies the condition of reducing knock intensity which is the pressure oscillation initiated by auto-ignition of the end gas. The knock intensity is thought to be decreased by suppressing the reaction rate of auto-ignition. In this study, the
Mitsuaki OHTOMO   +3 more
doaj   +1 more source

Experimental Study on the Impingement Characteristics of Self-Excited Oscillation Supercritical CO2 Jets Produced by Organ-Pipe Nozzles

open access: yesEnergies, 2021
Supercritical carbon dioxide (SCO2) jets are a promising method to assist drilling, enhance oil–gas production, and reduce greenhouse gas emissions. To further improve the drilling efficiency of SCO2 jet-assisted drilling, organ-pipe nozzles were applied
Mengda Zhang   +2 more
doaj   +1 more source

The transfer functions of rocket nozzles [PDF]

open access: yes, 1952
The transfer function is defined as the fractional oscillating mass flow rate divided by the fractional sinusoidal pressure oscillation in the rocket combustion chamber. This is calculated as a function of the frequency of oscillation.
Tsien, H. S.
core   +1 more source

Opto-Mechanical Chaotic Behaviour of Micron-Scaled On-Chip Resonators [PDF]

open access: yes, 2006
Opto-mechanical vibration of an on-chip oscillator is experimentally excited by radiation-pressure nonlinearity to a regime where oscillation is chaotic.
Carmon, Tal   +2 more
core   +1 more source

Flame propagation behavior of propane–air premixed combustion in a confined space with two perforated plates at different initial pressures

open access: yesEnergy Science & Engineering, 2022
The aim of this paper is to analyze local autoignition induced by secondary flame acceleration. The secondary flame acceleration process and the local autoignition formation mechanism at the condition of the secondary flame acceleration propagation were ...
Yangyang Yu   +3 more
doaj   +1 more source

Study on Self-Excited Oscillation Suppression of Supersonic Inlet Based on Parallel Cavity

open access: yesFrontiers in Energy Research, 2022
Aiming at the problem of self-excited oscillation in a supersonic inlet, the oscillation suppression of parallel cavities in a shock system is studied. Based on the shock dynamic model, the theoretical calculation model of parallel cavity under dynamic ...
FeiChao Cai, Xing Huang
doaj   +1 more source

Analysis of the forces driving the oscillations in 3D fluidic oscillators [PDF]

open access: yes, 2019
One of the main advantages of fluidic oscillators is that they do not have moving parts, which brings high reliability whenever being used in real applications.
Baghaei, Masoud   +1 more
core   +2 more sources

Effects of high-pressure treatment on the structure and function of myofibrils

open access: yesBiophysics and Physicobiology, 2021
The effects of high pressure (40–70 MPa) on the structure and function of myofibrils were investigated by high pressure microscopy. When this pressure was applied to myofibrils immersed in relaxing solution, the sarcomere length remained almost unchanged,
Seine A. Shintani
doaj   +1 more source

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