Fluidic oscillator

Abstract

The present invention relates to a fluidic oscillator for generating larger amplitude oscillations by eliminating the inertial dependence of the oscillations. Depending on the circuit embodiment, a pressure or temperature change drives a pressure change in the vessel, causing a flow of working fluid between the vessel and the load, where useful work is dissipated. The flow varies out of phase with pressure changes in the vessel at a first phase angle determined by the dissipative load and the capacity of the vessel. Oscillation is maintained due to a second phase angle determined by a branch circuit comprising dissipative processes and capacitive processes, each dissipative process comprising any one or combination of the following: viscous resistance, thermal resistance, or mechanical friction, and each capacitive process includes any one or combination of: changes in hydrostatic pressure due to flow, fluid compressibility, thermal capacitance, or elasticity; and wherein, due to at least one mechanism that induces a gain, The magnitude of the pressure change increases with time or remains constant.

Description

technical field [0001] The present invention relates to fluidic oscillators. In particular, but not exclusively, the invention relates to a fluid oscillator in which means are provided for causing a phase shift between pressurization and volume (or displacement; displacement) of a fluid contained therein. More particularly, but not exclusively, the invention relates to a pump comprising such a fluid oscillator. Background technique [0002] The type of device referred to herein as a fluidic oscillator typically refers to a system in which a flow of energy is coupled into oscillation in a fluid. [0003] Fluid oscillations provide a means for generating useful work from a heat source, pressurized fluid source, or other type of energy source. In turn, they convert work and thus perform useful functions such as compressing gases, pumping liquids, heat pumping and cooling. Fluid oscillators differ from other similar devices in that they do not rely on mechanical pistons, turb...

AI Technical Summary

Problems solved by technology

[0012] Disadvantages associated with these devices include the need to place switching devices at both ends of the chamber

Also, if a larger displacement is to be achieved without the need for an additional valve with a critically regulated actuation pressure or if the chamber becomes unfavorably larger, the float must move a larger distance before switching

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