بررسی رفتار ارتعاشی پرخوران در اثر گرفتگی صافی ذرات دوده

سوزنی, ادیب; قبادیان, برات; کاظمی, محمد; مهدویان, علیرضا

doi:10.22034/er.2023.1975301.0

بررسی رفتار ارتعاشی پرخوران در اثر گرفتگی صافی ذرات دوده

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ گروه مهندسی مکانیک بیوسیستم‏، دانشگاه تربیت مدرس، تهران، ایران

² مرکز تحقیق، طراحی و تولید موتور ایران‌خودرو، تهران، ایران

10.22034/er.2023.1975301.0

چکیده

در موتور‏های دیزل، به دلایلی چون افزایش توان و بازده، کاهش حجم، کاهش وزن و افزایش کیفیت احتراق، استفاده از پرخوران بسیار پرکاربرد است. یکی از مشکلات رایج در موتور‏های دیزل، صافی جذب ذرات دوده موجود در مسیر خروجی پرخوران است که پس از مدتی دچار گرفتگی می‏‌شود. صافی مسدود شده مانع عبور گاز‏های خروجی با شار لازم شده و در نتیجه فشار برگشتی و دمای گاز‏های خروجی افزایش می‌یابد. این عامل سبب قرار گرفتن پرخوران در نزدیکی بازه عملیاتی ناپایدار شده و انتظار می‌رود این عوامل سبب تغییر رفتار ارتعاشی این مجموعه گردد. در این تحقیق با ایجاد چند سطح گرفتگی صافی ذرات دوده در دور‏های 2500 و 3200 د.د.د، اقدام به ذخیره داده‏‏‏‌های ارتعاشی پرخوران گردید. با این روش غیرمخرب می‌توان داده‌های دقیق‌تری برای انجام عمل رفع گرفتگی فعال صافی دوده نسبت به روش رایج به دست آورد. با استفاده از تبدیل فوریه سریع بر روی داده زمانی ذخیره شده و صافی کردن بازه مورد انتظار از داده، بسامد‏های کاری پرخوران مشخص شده و با استخراج ویژگی‏‌های حوزه بسامد و مقایسه آنها مشاهده شد که چگالی طیف توان و شار طیفی وضوح حدود 4 برابری نسبت به سایر ویژگی‌ها در نمایان‌سازی این رویداد را دارد. همچنین با تُند شدن دور موتور، گرفتگی صافی دوده تأثیر بیشتری در رفتار ارتعاشی پرخوران گذاشته و می‌توان با تغییرات ایجاد شده به گرفتگی آن پی برد.

کلیدواژه‌ها

عنوان مقاله [English]

Vibration analysis of turbocharger in different clogging conditions of Diesel Particle Filter (DPF)

نویسندگان [English]

Adib Souzani ¹
Barat Ghobadian ¹
Mohammad Kazemi ²
Alireza Mahdavian ¹

¹ Department of Biosystems Engineering, Tarbiat Modares University, Tehran, Iran

² Iran Khodro Powertrain Company (IPCO), Tehran, Iran

چکیده [English]

In diesel engines, for reasons such as increasing power and efficiency, reducing volume, reducing weight and increasing combustion quality, it is very common to employ a turbocharger. One of the most common problems in diesel engines is the absorption of soot particles in the turbocharger outlet, which clogged after a while. The blocked filter prevent to exhaust the gases with required flow rate, as a result, the back pressure and temperature of exhaust gases increase. This factor causes the turbocharger to be located near the unstable operating range and these factors expected to change the vibration behavior of this set. In this study, by creating several levels of soot particle clogging at 2500 and 3200 RPM, the turbocharger vibration signal was stored. Using this non-destructive method, more accurate data obtained to perform active Regeneration than the conventional method. Employing fast Fourier transform on stored time signal and filtering expected range of the signal, the turbocharger operating frequencies were determined and by extracting the frequency domain characteristics and comparing them, it observed that the power spectrum density and spectral flux had a resolution of approx. It has 4 times more than other features in indexing this event. In addition, as the engine speed increases, the soot filter clogging has a greater effect on the vibration behavior of the turbocharger.

کلیدواژه‌ها [English]

Turbocharging
Vibrational Behavior
Diesel Particle Filter

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