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A device and method for determining the sudden change of equilibrium point of ventilation supercavitation

A determination device and supercavitation technology, applied in measurement devices, instruments, fluid dynamics tests, etc., can solve the problems of poor repeatability, high cost, and heavy preparation work.

Inactive Publication Date: 2016-03-09
HARBIN ENG UNIV
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Problems solved by technology

Preparatory work required for experimental studies is tedious, costly, and poorly reproducible

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  • A device and method for determining the sudden change of equilibrium point of ventilation supercavitation
  • A device and method for determining the sudden change of equilibrium point of ventilation supercavitation
  • A device and method for determining the sudden change of equilibrium point of ventilation supercavitation

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with accompanying drawing:

[0037] The block diagram of the present invention is as figure 1 As shown, it consists of integral operation module, perturbation analysis module, sensor module, data acquisition module, data processing module and comparative analysis module. The functions of the integral calculation module and the perturbation analysis module described therein are realized by the programming of the single-chip microcomputer; the measurement of the pressure signal and the measurement function of the acceleration signal realized by the sensor module are respectively realized by the miniature patch type pressure sensor and the multi-point measurement, the linear acceleration of the moving body The acquisition is measured by the single-axis accelerometer ADXL190 with analog signal output; the function realized by the data acquisition module is realized by the A / D function of the PCI data acqui...

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Abstract

The invention belongs to the field of nonlinear dynamics and sensor detection, in particular relates to a judging device for determining the sudden change character of a ventilated supercavity balance point based on the theory of the nonlinear dynamics and a specified judging method of the sudden change character of the ventilated supercavity balance point. The judging device comprises an integral operation module, a perturbation analysis module, a sensor module, a data collection module, a data processing module and a comparison operation module. The judging device can judge the state of the ventilated supercavity more timely as per the navigation state of a navigation body during the navigation process of a ventilated supercavity navigation body, monitors the sensitive parameters which possibly cause sudden change and instability of ventilated supercavity in real time, and once the sensitive parameters of the ventilated supercavity are close to the sudden change critical parameter values, corresponding measures are taken, so that the sensitive parameters of the ventilated supercavity are far away from the sudden change critical parameter values, the stability of the ventilated supercavity is further ensured, and basic guarantee is provided for stable navigation of the ventilated supercavity navigation body.

Description

technical field [0001] The invention belongs to the field of nonlinear dynamics and sensor detection, and in particular relates to a judging device and a special judging method for determining the abrupt change characteristics of supercavitation equilibrium points based on the nonlinear dynamic theory. Background technique [0002] The application of supercavitation technology can greatly reduce the frictional resistance of underwater or surface moving bodies and increase the speed of navigation. However, supercavitation flow is a very complicated flow problem, including unsteady, compressible, phase change, Turbulence and other complex flow phenomena in the study of fluid dynamics bring difficulties to the study of cavitation dynamics. [0003] At present, the research on the characteristics of complex cavitation flow mainly adopts two methods: numerical simulation and experimental research. The research content mainly focuses on the numerical simulation of the supercavitat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
Inventor 赵新华孙尧安伟光赵国良韩云涛白涛
Owner HARBIN ENG UNIV
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