Buoyancy lift measuring device for underwater thermal jet

Abstract

The invention provides a buoyancy lift measuring device for an underwater thermal jet. The flow field of an underwater thermal jet is accurately measured through a laser induced fluorescence method based on the analogy between a mass transfer process and a heat transfer process. By adjusting the working positions of a camera and a laser, the buoyancy lift characteristics (such as form, diffusion area and the like) of the thermal jet on horizontal planes at different heights can be obtained, and the buoyancy lift state of the thermal jet on the longitudinal section can also be obtained. By measuring the mass transfer process, no heat loss exists in the transfer of a jet medium in a pipeline. The temperature change of the free liquid level of the heat transfer test is greatly influenced by surrounding environment factors, and the free liquid level of the mass transfer test does not change due to the influence of the surrounding environment factors. The underwater thermal jet is measuredin a non-contact mode through the planar laser induced fluorescence method, and the buoyancy lift form of the thermal jet is not damaged. Therefore, the measurement precision is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of underwater measurement, and in particular relates to a buoyancy measurement device of an underwater thermal jet. Background technique [0002] The buoyancy measurement device of the underwater hot jet can be used to measure the buoyancy change process of the underwater hot jet, understand its flow and buoyancy mechanism, and grasp the relationship between the flow velocity and temperature of the hot jet. The buoyancy change process of the underwater hot jet belongs to the heat transfer process, and its measurement device is generally divided into two parts: the simulation of the hot jet and the temperature measurement of the hot jet buoyancy process. At present, the simulation of thermal jets generally adopts the method of continuously providing hot water in a constant temperature water tank, and uses a hose to pass the hot water to the discharge port of the model; while for the temperature measurement of...

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Problems solved by technology

[0004] (1) Ideally, the temperature of hot water set in the constant temperature water tank is the discharge temperature of the discharge port of the model. Heat loss is inevitable during the process of passing through the hose;

[0005] (2) Due to the limitations of the performance and accuracy of temperature sensors on the market, the error in measuring the buoyancy of the hot jet is large; there is also a temperature sensor array arranged in the buoyancy area of ​​the hot jet, which will destroy the temperature of the hot jet. buoyant form

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