بررسی اثر شکل پره در پارامتر های مکانیکی هوای عبوری از زانویی کانال های هوا به روش عددی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشگاه ملایر، ملایر، ایران

2 استادیار،، دانشگاه فنی و حرفه‌ایی تهران، تهران، ایران

چکیده

این مطالعه با استفاده از روش حجم محدود و نرم افزار انسیس به منظور بررسی تاثیر ساختار پره‌های زانویی کانال هوا روی عملکرد آن انجام شده است. زانویی کانال هوا از جمله پرکاربردترین کانال‌های به کار گرفته در تاسیسات تهویه مطبوع است و تغییر هندسه و ساختار آن تاثیر چشم‌گیری در عملکرد آن دارد. هدف از انجام این تحقیق بررسی تغییر ساختار پره های زانویی کانال هوا از حالت ساده به چند مدل مختلف است. این تغییرات شامل پره های زیگزاگی، نیم‌دایره و سینوسی با اندازه ها و گام‌های متفاوت و مقایسه آنها با پره ساده می باشد. بنابراین تغییرات میدان دما، سرعت و فشار هوای جاری در زانویی کانال ارزیابی شده است. نتایج این تحقیق نشان می دهد استفاده از پره هایی با حالت زیگزاگی، با اندازه گام ریزتر که انتهای جانبی آن رو به سمت پایین باشد، موجب اغتشاش بیش‌تر جریان هوا در زانویی کانال می گردند و میزان تبادل حرارتی با محیط را افزایش خواهند داد. انتهای لبه پره ها نیز در میزان اغتشاش تاثیرگذار بوده است. همچنین استفاده از پره های سینوسی موجب کاهش فشار روی دیواره خارجی شعاعی زانویی کانال هوا می‌گردد. بطوریکه به ترتیب استفاده از پره های سینوسی و پره های صاف معمولی، کم‌ترین و بیش‌ترین میزان فشار را برای دیواره بیرونی قوس زانویی کانال هوا ایجاد می کند.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation the effect of fin shape on mechanical parameter of air that pass through elbow of air channels with numerical method

نویسندگان [English]

  • ali shahrjerdi 1
  • seyed sharafoddin hosseini 2
1 Assistant Professor, Malayer University, Malayer, Iran
2 Assistant Professor, Tehran Technical and Vocational University, Tehran, Iran
چکیده [English]

This study used the finite volume method and ANSYS software to investigate the effect of elbow air duct vane structures on its performance. Elbow air ducts are among the most widely used ducts in HVAC systems, and changes in their geometry and structure have a significant impact on their performance. The purpose of this study is to investigate changes in the structure of elbow air duct vanes from simple to several different models. These changes include zigzag, semicircular, and sinusoidal vanes with different sizes and pitches, comparing them with a simple vane. Therefore, changes in the temperature, velocity and pressure fields of the air flow in the elbow duct are evaluated. The results of this research show that using zigzag vanes, with smaller pitches, whose lateral ends are facing downwards, causes more disturbance in the air flow in the elbow duct, and increases the heat transfer with the environment. The vane edge tips also had an impact on the amount of disturbance. Also, using sinusoidal vanes has reduced the pressure on the outer radial wall of the elbow air duct. So that, respectively, the use of sinusoidal and simple straight vanes created the lowest and highest pressure levels for the outer wall of the elbow air duct

کلیدواژه‌ها [English]

  • air channels
  • elbow of air channel
  • fin of air channel
  • air conditioning
  • optimization of energy consumption

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مکانیک سیالات و آیرودینامیک
دوره 12، شماره 1 - شماره پیاپی 31
بهار و تابستان 1402
شهریور 1402
صفحه 133-143

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سابقه مقاله

  • تاریخ دریافت: 24 فروردین 1401
  • تاریخ بازنگری: 10 مرداد 1402
  • تاریخ پذیرش: 19 مرداد 1402
  • تاریخ انتشار: 03 شهریور 1402

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