Experimental analysis and design optimization of an empty diffuser for performance Enhancement in DAWT

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-11-30 DOI:10.1016/j.csite.2024.105590

Mustafa A. Almaliki , Ihab Omar , Mohanned Mohammad Naji , Tabarak Jassim Alwan

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引用次数: 0

Abstract

With the increasing demand for clean energy, and because of the acute problems caused by fossil fuels on the environment. It has become very necessary to search for alternative energy that is inexhaustible and safe at the same time. Researchers believe that diffuser-assisted wind turbines can play an important role in solving energy problems, especially in residential areas. As it is known that energy is proportional to the cube of velocity, that is, as the air velocity increases slightly, the energy increases exponentially. This paper has focused on the flanged diffuser because it can increase the pressure drop at the outlet of the diffuser, which increases the flow velocity. The study also focused on 5 variables in the diffuser to obtain the ideal design for the diffuser, namely the length of the diffuser, the angle of inclination of the diffuser, the angle of inclination, the angle of the lip and the height of the lip. Using the CFX 3D turbulent model (SSTK-ω) ANSYS 20. The results showed that the diffuser with a 50 bevel in addition to an entry flange at an angle of 30, L/D = 0.6 and H/D = 0.3 gives a speed increase of 5 times compared to the flange normal.

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提高DAWT性能的空扩散器的实验分析与设计优化

随着人们对清洁能源需求的不断增加，以及由于化石燃料对环境造成的严重问题。寻找取之不尽，用之不竭，同时又安全的替代能源变得非常必要。研究人员认为，扩散器辅助风力涡轮机可以在解决能源问题方面发挥重要作用，特别是在居民区。众所周知，能量与速度的立方成正比，即随着空气速度的轻微增加，能量呈指数增长。本文重点研究了法兰扩压器，因为它可以增加扩压器出口的压降，从而提高流速。并对扩压器中的5个变量进行了研究，得到了理想的扩压器设计，即扩压器的长度、扩压器的倾斜角、倾斜角、唇形角和唇形高度。采用CFX三维湍流模型（SSTK-ω） ANSYS 20。结果表明，当扩压器斜角为50时，再加一个角为30、L/D = 0.6、H/D = 0.3的进口法兰时，速度比正常法兰提高了5倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.