Self-excited oscillation
WebFeb 5, 2024 · Self-excited oscillation Pulsating flow Heat transfer deterioration Buoyancy effect Nomenclature cp specific heat (kJ/kg·K) P pressure (MPa) q heat flux (kW/m 2) Qloss heat loss (kW) G mass flux (kg/m 2 ·s) m mass flow rate (kg/s) d1 upstream nozzle diameter (mm) d2 downstream nozzle diameter (mm) Dc chamber diameter (mm) Lc chamber … WebApr 9, 2024 · The self-excited oscillation of the LCE spring oscillator is determined to result from the self-shading effect of the coating during its movement. The triggering condition of self-excited oscillation is determined via the contraction coefficient, damping coefficient, light intensity, gravitational acceleration, painting stretch, and spring ...
Self-excited oscillation
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WebSelf-excited synchronous oscillations in multibody dynamical systems have been documented since the middle of the seventeenth century. Huygens made the amazing observation that two pendulum clocks hanging from a common flexible support swung together periodically approaching and receding in opposite motions [1]. Web1 day ago · The experimental results showed that the self-excited oscillation pulse fluid enhanced the erosion ability of the abrasive water jet on the SiC surface and significantly improved the material ...
WebFeb 5, 2016 · For small drops, chaotic oscillations constituted by several broadened sectorial modes and corresponding zonal modes are self-excited. The growing oscillation … WebJun 1, 2024 · Self-excited means that the beam can start and sustain an oscillation under DC voltage controlled by itself; the oscillating frequency is related to its natural frequency but not the frequency of the driving signal. In the oscillation, the resonator is subjected to the combined action of electrostatic force F E and elastic restoring force F M.
WebApr 14, 2024 · A self-excited oscillating pulsed abrasive water jet polishing method is proposed to solve the problems of low removal efficiency in traditional abrasive water jet polishing and the influence of an external flow field on the material surface removal rate. WebJun 11, 2024 · In the self-excited cavitation waterjet issued from the axisymmetric cavity, the oscillations of the shear layer corresponded to three orders of hydrodynamic modes. …
WebApr 8, 2024 · A novel self-excited oscillating mixer is developed for the descaling of strip steel, which synthesizes the post-mixed abrasive water jet and self-excited oscillation. …
WebJun 10, 1991 · 1, a kind of self-excited oscillation pulsed jet nozzle, chamber wall 3 upper-thin-lower-thicks that it is characterized in that the resonance chamber 1 of this nozzle, form up big and down small... cbt and sleepWebJun 20, 2024 · The best operating scheme of borehole hydraulic mining for underground oil shale is to use the pulsed water jet which is produced by the self-excited oscillation pulsed jet nozzle to break underground oil shale under the non-submerged condition. Moreover, the pulsed water jet should be placed parallel to the oil shale bedding. cbt and sexual abuseWebJul 1, 2024 · A method of stabilizing the self-excited oscillation of a cantilevered pipe conveying fluid because of non–self-adjointness is proposed theoretically and experimentally. Complex eigenvalues... bus nancy ligne 21WebApr 8, 2024 · A novel self-excited oscillating mixer is developed for the descaling of strip steel, which synthesizes the post-mixed abrasive water jet and self-excited oscillation. The realizable k-ɛ model is selected to investigate the effects of different abrasive entrance, inlet pressure, mixing chamber diameter, and length on the jet characteristics. cbt and sleep issuesWebJul 1, 1990 · Abstract We analyze the linearized version of an analytical model, which combines linear ocean dynamics with a simple version of the Bjerknes hypothesis for El Niño. The ocean is represented by linear shallow water equations on an equatorial beta-plane. It is driven by zonal wind stress, which is assumed to have a fixed spatial form. … bus nancy ligne 2Self-oscillation is the generation and maintenance of a periodic motion by a source of power that lacks any corresponding periodicity. The oscillator itself controls the phase with which the external power acts on it. Self-oscillators are therefore distinct from forced and parametric resonators, in which the power that … See more The study of self-oscillators dates back to Robert Willis, George Biddell Airy, James Clerk Maxwell, and Lord Rayleigh in the 19th century. The term itself (also translated as "auto-oscillation") was coined by the Soviet … See more Self-oscillation is manifested as a linear instability of a dynamical system's static equilibrium. Two mathematical tests that can be used to diagnose such an instability are the See more Population cycles in biology For example, a reduction in population of an herbivore species because of predation, this makes the … See more Railway and automotive wheels Hunting oscillation in railway wheels and shimmy in automotive tires can cause an uncomfortable … See more • Hopf bifurcation • Limit cycle • Van der Pol oscillator See more cbt and stages of changeWebA test system of self-excited oscillation pulsed water jet characteristics was designed, and it is composed of pulsed jet producer devices, particle image velocity (PIV) measuring system, pressure pulse test device and the confining pressure cavity suitable for a PIV test. The characteristics of flow field, pressure oscillation, pulsed ... cbt and smart goals