کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6685310 501860 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of choked outlet on transient energy growth analysis of a thermoacoustic system
ترجمه فارسی عنوان
تأثیر خروجی خالی شده بر روی تحلیل انرژی رشد گذرا یک سیستم گرماسوختی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Thermoacoustic instability occurs in many practical combustion systems. These systems are non-normal and associated with transient growth of acoustic disturbances. If the transient growth is large enough, then thermoacoustic instability may be triggered. In this work, transient energy growth analysis of a thermoacoustic system with a choked outlet is conducted. The effect of the choked boundary is studied by using an analytical and a linearized Euler equation (LEE) method. To quantify the transient growth, two energy measures are defined and calculated. One is associated with the acoustical energy. The other is the total energy of both entropy and acoustic fluctuations. Comparison is made between the transient growth results obtained from the analytical method and those from the LEE method. It is found that the transient growth analysis of the total energy by using the analytical model with the expression of the choked outlet is consistent with that by using the LEE method. However, when only acoustical energy is considered, the analytical model may leads to a wrong prediction of transient growth. The present work opens up new applicable way to predict transient stability behaviors of a practical engine system ended with a choked outlet.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 160, 15 December 2015, Pages 502-510
نویسندگان
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