مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی تجربی اثر تغییر مکان بالکهای انتهایی بر کاهش میزان غیریکنواختی و نوسانات جریان دنباله زیرسطحی

نوع مقاله : پژوهشی اصیل

نویسندگان
شکراله محمدبیگی 1
علیرضا شاطری 2
مجتبی دهقان منشادی 3
1 دانشجوی دکتری مهندسی مکانیک دانشگاه شهرکرد
2 دانشیار مهندسی مکانیک دانشگاه شهرکرد
3 دانشیار مهندسی هوافضا دانشگاه صنعتی مالک اشتر
چکیده
در پژوهش حاضر میدان دنباله جریان عبوری از روی یک مدل زیردریایی در تونل باد به صورت تجربی بررسی شده است. آزمایش­ها به منظور بررسی اثر محل قرارگیری بالک­های انتهایی بر روی جریان دنباله ورودی به پروانه مدل زیرسطحی انجام شده است. به منظور بررسی اثر محل قرارگیری بالک­های انتهایی به عنوان مهم­ترین نوآوری پژوهش حاضر، بالکهای مذکور در سه موقعیت طولی X/L=0.89, 0.92, 0.95 بر روی پاشنه مدل زیرسطحی نصب شده و جریان دنباله در موقعیت X/L=0.978 و عدد رینولدز 5^10*6 توسط پراب پنج حفره و جریان ­سنج سیم­ داغ اندازه ­گیری شده است. در پایان این بررسی ­ها موقعیت طولی X/L=0.95 به ­عنوان مکان بهینه برای قرارگیری بالک­های انتهایی به منظور بهبود جریان دنباله ورودی به پروانه از نظر کاهش مساحت کلی و نیز کمترین میزان اغتشاشات و غیریکنواختی انتخاب شده است. نتایج به ­دست آمده در طول این پژوهش نشان دادند که ورود جریان دنباله پایه نگهدارنده به قسمت پاشنه موجب رشد مساحت ناحیه دنباله شده و باعث افزایش متوسط سرعت و کاهش میزان غیریکنواختی جریان دنباله می شود.
کلیدواژه‌ها
مدل زیرسطحی
سطوح کنترلی
تونل باد
پراب پنج حفره
جریان سنج سیم داغ
دنباله

موضوعات

عنوان مقاله English

Experimental investigation of the effect of displacement of stern planes on reducing non-uniformity and fluctuations of a submarine's wake flow

نویسندگان English

Shokrallah Mohammmad Beigi 1
Alireza Shateri 2
Mojtaba Dehghan Manshadi 3
1 Ph.D. student of Mechanical Engineering of Shahrekord University
2 Associate Professor of Mechanical Engineering of Shahrekord University
3 Associate professor of aerospace engineering of Malek Ashtar University
چکیده English

In the present study, the wake flow field of a submarine model was investigated experimentally in a wind tunnel. The experiments were conducted to determine the effect of the location of control surfaces on the wake inflow to the impeller of the submarine. In order to investigate the effect of the location of control surfaces as the most important innovation of the present study, the aforementioned surfaces were installed in three longitudinal positions X/L=0.89, 0.92, 0.95 on the heel of the submarine model, and the wake flow was measured at position X/L=1.7 and the Reynolds number 6*10^5 by a five-hole probe and a hotwire anemometer. Finally, the longitudinal position X/L=0.95 was selected as the optimal location for the stern planes to improve the wake inflow to the impeller in terms of reducing its total area and the least amount of turbulence and non-uniformity. The results obtained during this study showed that arriving of the holder basechr('39')s wake to the stern area increases ​​the area and average velocity and subsequently reducing the non-uniformity of the wake flow.

کلیدواژه‌ها English

Submarine model
Control Surfaces
Wind tunnel
Five-hole probe
hotwire
Wake flow
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مهندسی مکانیک مدرس
دوره 21، شماره 4
فروردین 1400
صفحه 209-224