Dynamic behavior of non-return valves operating at small opening
Joint Authors
al-Sadi, Ali A. M.
Laftah, Hamid D.
Abbas, Ali W.
Source
Issue
Vol. 16, Issue 3 (30 Sep. 2010), pp.5481-5501, 21 p.
Publisher
University of Baghdad College of Engineering
Publication Date
2010-09-30
Country of Publication
Iraq
No. of Pages
21
Main Subjects
Topics
Abstract AR
في هذا البحث، تمت دراسة التصرف الديناميكي للصمامات اللاارجاعية تحت جريان نفاث.
اشتقت المعادلات الخاصة بحركة الصمام و جريان المائع بدلالة المتغيرات اللابعدية.
إن معادلات الحركة و الجريان هي معادلات تفاضلية غير خطية و مرتبطة التصرف، و لذلك تم بناء برامج حاسوبية باستخدام ما يسمى بـ (MAT LAB) لحل هذه المعادلات عدديا.
بينت الدراسة أن هنالك ثلاث حالات لاستجابة الصمام تعتمد على فرق الضغط الهايدروستاتيكي، و وجد أن الصمام يهتز عند تردد حدي ثابت و الذي يؤدي بدوره إلى فشل الصمام، و كذلك بينت الدراسة أن قيمة التردد الحدي الثابت تنقص بزيادة معامل الجساءة و معامل القصور الذاتي و إن معامل الخسارة ليس له تأثير ذو قيمة على اهتزاز الصمام و كمية الجريان.
Abstract EN
In the present work a general dynamic behavior of non return valves subjected to jet flow is presented.
The differential equations of valve motion and discharge were developed in a non-dimensional from, in terms of suitable dimensionless variables and parameters of the valve system.
The derived equations are coupled nonlinear differential equations.
Thus, a computer program was developed using a package called (Matlab) to solve these equations.
The study shows that there are three types of the valve responses depending on the overall hydrostatic pressure difference and it is found that the valve vibrating at a constant limit cycle, which is leading to the failure of the system.
It is also shown that the limit cycle frequency decreases with increasing the stiffness parameter and inertia factor.
Finally the study shows that the losses factor has negligible effect on valve vibration and discharge.
American Psychological Association (APA)
al-Sadi, Ali A. M.& Laftah, Hamid D.& Abbas, Ali W.. 2010. Dynamic behavior of non-return valves operating at small opening. Journal of Engineering،Vol. 16, no. 3, pp.5481-5501.
https://search.emarefa.net/detail/BIM-288259
Modern Language Association (MLA)
al-Sadi, Ali A. M.…[et al.]. Dynamic behavior of non-return valves operating at small opening. Journal of Engineering Vol. 16, no. 3 (Sep. 2010), pp.5481-5501.
https://search.emarefa.net/detail/BIM-288259
American Medical Association (AMA)
al-Sadi, Ali A. M.& Laftah, Hamid D.& Abbas, Ali W.. Dynamic behavior of non-return valves operating at small opening. Journal of Engineering. 2010. Vol. 16, no. 3, pp.5481-5501.
https://search.emarefa.net/detail/BIM-288259
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 5499-5501
Record ID
BIM-288259