Pulsejet - Wikipedia
A pulsejet engine (or pulse jet) is a type of jet engine in which combustion occurs in pulses. A pulsejet engine can be made with few [1] or no moving parts, [2] [3] [4] and is capable of running statically (that is, it does not need to have air forced into its inlet, typically by forward motion).
Formation Principle and Characteristics of Self-Supercharging …
May 4, 2022 · High-pressure pulsed water jet technology has considerable development potential in the field of rock fragmentation. To overcome the shortcomings of existing pulsed jets, a self-supercharging pulsed water jet (SSPWJ) generation method is proposed, which is based on the theory of the pulsed water jet and the principle of hydraulic boosting.
Study on dynamic characteristics of transient high-speed water jet ...
Oct 15, 2023 · A transient high speed water jet generator used in laboratory is designed. This research investigates the physical mechanism and dynamic characteristics of morphological evolution of transient high-speed water jet impacting target plates above and …
Assessment of the effectiveness of high-pressure water jet …
Jun 28, 2024 · Research on the pulse generation mechanism and the assessment of erosive potential can form the basis for optimizing the design and operation of pulsating water jets in surface machining. This comprehensive understanding underpins the enhancement of efficiency and effectiveness of pulsating water jet applications in various industrial and ...
Numerical simulation of rock-breaking under the impact load …
Feb 1, 2020 · A new pulse jet generator was designed by Dehkhoda et al. (2012) that facilitated the production of pulsed water jets when a piston was impacted by a hammer. A new type of pulsed air jet was used by Hu et al. (2014) to study aggregate breakage, and the results indicated that air mixed with the cavity had a significant effect on the material ...
Influence of Hydraulic Parameters on Multi-Stage Pulse ... - MDPI
Aug 20, 2023 · The multi-stage pulse competition of pressurized pulsed water jet becomes the initial pulse at the head tip, and hydraulic parameters are the key parameters that affect the characteristics of multiple pulses.
Dynamic Simulation Model and Performance Optimization of a
Aug 3, 2024 · The pressurized pulsed water jet (PPWJ) is a new type of pulsed jet that offers high-amplitude pressurization, variable pulse pressure and frequency, and a high energy usage rate.
Analytical and Experimental Study of Pressure Dynamics in a …
Mar 29, 2012 · Pulsed high-velocity water jets are of interest for breaking rocks and other materials. This paper describes a straightforward way of generating single water pulse with a hammer impacting a piston that rests on top of a chamber filled with water. This impacting action pressurises the water, expelling it at high velocity through a nozzle.
On the concrete breakage by pulsed water jet impact: Fracture ...
Dec 1, 2023 · The results show that there is a better concrete-breaking effect for pulse water jet by repeatedly utilizing the extremely high water-hammer pressure and effectively weakening the water-cushion effect, compared with continuous water jet.
Dependence of Pressure Characteristics of Pressurized Pulse Water Jet ...
Aug 14, 2024 · Among them, the pressurized pulsed water jet, as a new type of pulsed water jet [22], has the equipment characteristics of low pressure input–double pressure pulse output–efficient breaking of hard rock [23]. It can generate multiple …