特殊初始条件下气流速度衰减分析

Q3 Engineering
Diagnostyka Pub Date : 2022-09-23 DOI:10.29354/diag/154859
O. Voznyak, N. Spodyniuk, O. Savchenko, O. Dovbush, M. Kasynets, O. Datsko
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引用次数: 1

摘要

本文致力于解决旋流射流在前提下提高配气效率的重大问题。本文的目的是为了减小从空气分布器泄漏的不同气流由于初始湍流加剧而引起的速度衰减系数,并得到室内空气分布计算的解析方程,以保证室内空气参数的规范。流扭效应使速度衰减系数降低了2.4倍。回归分析表明,旋流射流的衰减系数受扭转板倾角的影响较大,受气流方向变化角的影响较小。各类型矩形射流的衰减系数受狭缝边长b/l比的影响较大,气流方向变化角的影响也较小。为了使衰减系数最小化,对于旋流射流采用较小的旋板倾角的气流分布器,对于所有类型的矩形射流采用较小的狭缝尺寸比是有效的。α—转盘倾斜角;β -空气夹角b -狭缝高度m;
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of air jets velocity attenuation at special initial conditions
The article is devoted to solving the significant problem of efficiency increasing of air distribution in the premise by swirl air jet. The aim of the article is to decrease coefficient of velocity attenuation due to intensification of initial turbulence of different air streams leakage from the air distributor and to obtain of analytical equations for calculation of air distribution in a room to ensure the normative indoor air parameters. Effect of flow twisting results in a reduction of the velocity attenuation coefficient by 2.4 times. The regression analysis testified that the attenuation coefficient of the swirl air jet is more affected by the angle of the twisting plates inclination and less affected by the angle of change of the air flow direction. The attenuation coefficient of all types of rectangular air jets is more influenced by the the ratio of the sides of slit b/l and the angle of change of the air flow direction is also less affected. To minimize the attenuation factor, it is effective to use air distributors at smaller swivel plates inclination angles for swirl air jets and a smaller slit size ratio for all types of rectangular air jets. α – angle of swivel plate’s inclination; β – angle the air b – height of the slit, m;
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来源期刊
Diagnostyka
Diagnostyka Engineering-Mechanical Engineering
CiteScore
2.20
自引率
0.00%
发文量
41
期刊介绍: Diagnostyka – is a quarterly published by the Polish Society of Technical Diagnostics (PSTD). The journal “Diagnostyka” was established by the decision of the Presidium of Main Board of the Polish Society of Technical Diagnostics on August, 21st 2000 and replaced published since 1990 reference book of the PSTD named “Diagnosta”. In the years 2000-2003 there were issued annually two numbers of the journal, since 2004 “Diagnostyka” is issued as a quarterly. Research areas covered include: -theory of the technical diagnostics, -experimental diagnostic research of processes, objects and systems, -analytical, symptom and simulation models of technical objects, -algorithms, methods and devices for diagnosing, prognosis and genesis of condition of technical objects, -methods for detection, localization and identification of damages of technical objects, -artificial intelligence in diagnostics, neural nets, fuzzy systems, genetic algorithms, expert systems, -application of technical diagnostics, -diagnostic issues in mechanical and civil engineering, -medical and biological diagnostics with signal processing application, -structural health monitoring, -machines, -noise and vibration, -analysis of technical and civil systems.
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