Jet-flow motion measuring device in scale model based on PIV

Abstract

The invention discloses a jet-flow motion measuring device in a scale model based on PIV, and relates to the technical field of laser measurement. The jet-flow motion measuring device in the scale model based on the PIV includes a laser light source system, a synchronous control system, a flow field imaging system, a particle image processing and analysis system, a movable sliding table system, atracer particle generator, a computer and a scale model; and the movable sliding table system includes a camera horizontal sliding table, a camera vertical sliding table, a laser device horizontal sliding table, a laser device vertical sliding table, a proximate matter frame, a transmission system and a sliding table automatic control system. Through the implementation of the jet-flow motion measuring device in the scale model based on the PIV, the limitation that an existing PIV testing technology has a small single measurement range is overcome, continuously measuring in the whole measuringarea can be carried out successively, the overall time-averaged flow information of the measuring area can be acquired, and the application scope of the PIV technology is greatly expanded.

Description

technical field [0001] The invention relates to the technical field of laser measurement, in particular to a jet movement measurement device in a scaled-down model based on PIV. Background technique [0002] With the rapid development of science and technology and the continuous improvement of social and economic levels, people's requirements for the comfort of the indoor thermal environment of large-space buildings are becoming more and more stringent. The airflow organization mode of horizontal jet nozzle side delivery is the air supply mode commonly used in large-space buildings at the present stage, which can not only ensure that the working area in the lower part of the building meets the air conditioning design requirements, but also achieves the purpose of energy saving. However, due to the lack of large-scale measured data and theoretical basis, the actual engineering design is generally based on the temperature difference of the jet flow, and the semi-empirical jet ...

AI Technical Summary

Problems solved by technology

Since the PIV measurement process has certain requirements on the light intensity, thickness and the permeability of the optical path, the existing indoor flow field measurement based on PIV technology is still subject to certain limitations. However, this measurement cannot meet the required flow field measurement range, which greatly limits the practical application of this technology.

The existing technology uses multiple cameras to measure at the same time, which requires a lot of money, manpower and time

Due to the lack of large-scale measured data and theoretical basis, the actual engineering design generally only uses the jet temperature difference as the basis, and simply applies the semi-empirical jet flow formula to carry out the design and calculation of the non-isothermal air supply airflow organization, without considering the effect of the hot plume on the cold jet. Interference effect, resulting in the layered layer of the actual layered air conditioner being damaged by the thermal plume, increasing the energy consumption of the air conditioner, and the design effect is not ideal

Images