Study On The Fractal Characteristics Of Non-isothermal Jets Of Side Air Supply In Air-conditioned Rooms

In the existing design of side-supply air flow organization,the jet velocity of the tuyere axis and the length of the side-supply wind jet and the equivalent diameter of the tuyere cannot be completely matched.This is because the jet has become turbulent at the tuyere,forming turbulent motion.Turbulent motion is a form of fluid motion with obvious nonlinear characteristics,and the turbulent velocity is not a fixed value in the time series.The original method uses the time-average value of the jet velocity instead of the instantaneous value to calculate the airflow organization.The result cannot reflect the actual situation of the indoor flow field in the air-conditioned room,which leads to design errors.In this thesis,by combining theoretical derivation and experimental verification,the idea of shape is introduced into the study of the turbulence characteristics of the si de-supply air jet in associate cool area,that verifies the employment of shape theory t o check the nonlinear downside of turbulence within the motion of the side-supply air jet.The practicableness.First of all,the turbulence development existing within the movement of the side-supply air jet is analyzed from the macroscopic to the microscopic level from the the oretical level,that proves that the turbulence has shape characteristics,and also the sh ape theory will be accustomed study this nonlinear downside.Secondly,by mensuration the instant speed and instant temperature distinction of the axial jet at the aspect air outlet of the cool area underneath the aspect air flow org anization,the shape dimension,turbulence intensity,Archimedean range and also the statistic of the aspect air jet square measure obtained.Length of aspect jet.supported t he analysis on the connection between shape dimension and turbulence intensity,the c onnection between shape dimension and mathematician criterion,and also the relation ship between shape dimension and also the length of side-supply air jet,the results sq uare measure obtained by exploitation Origin code combined with experiments The co rresponding mathematical model was established supported the information of,and al so the practical relationship between shape dimension and turbulence intensity,the pra ctical relationship between shape dimension and Archimedean criterion,and also the r elative vary of shape dimension and aspect air jet The practical relationship between.The analysis results show that: the turbulence intensity of the air-conditioning are a aspect air jet at the tuyere will increase with the rise of the shape dimension,and sho ws a plain linear relationship;whereas the Archimedes’ range will increase with the ri se of the turbulence intensity.Increase and show a fair power perform relationship.On the idea of the higher than two conclusions,it’s established that there’s a completely c orrelate even power perform relationship between mathematician criterion and shape dimension,and also the practical relationship between them is obtained.Taking this as associate entry purpose,it’s established that there’s a particular practical relationship between the shape dimension and also the length of the side-supply air jet and also the equivalent diameter of the tuyere.Therefore,the shape dimension,which might quantitatively replicate the comple xness and irregularity of the side-supply air jet movement,will be used as a replaceme nt side-supply air flow organization style parameter to replicate the impact of turbulen ce on the side-supply air flow organization style.The influence of this provides a repl acement direction for the long run study of side-supply air flow organization.