عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
NATIONAL BIBLIOGRAPHY NUMBER
Number
۱۴۲۵۵پ
LANGUAGE OF THE ITEM
.Language of Text, Soundtrack etc
فارسی
TITLE AND STATEMENT OF RESPONSIBILITY
Title Proper
شبیه سازی میدان جریان سه بعدی در شیارهای یک جهته و دوجهته نشت¬بند گازی خشک
First Statement of Responsibility
/ زهرا سجادیان
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
: دانشگاه شهیدچمران اهواز، دانشکده مهندسی، گروه مکایک
Date of Publication, Distribution, etc.
، ۱۳۹۴
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
۱۲۱ص.
Accompanying Material
+همراه سی دی
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
کارشناسی ارشد
Discipline of degree
مهندسی مکانیک (تبدیل انرژی)
Date of degree
۱۳۹۴/۰۶/۲۵
SUMMARY OR ABSTRACT
Text of Note
Surname: SajadianName: ZahraTitle: Simulation of the three dimension flow field of uni-directional and bi-directional dry gas sealSupervisore: Dr. Mohammad Reza SaffarianAdvisor: Dr. Seyed Saied BahrainianDegree: M. ScField: Mechanical EngineeringDivision: Energy ConversionUniversity: Shahid Chamran University of AhvazFaculty: EngineeringDepartment: Mechanical Engineering Graduating Date:Number of Page: 121Key Words: Flow simulation, Dry gas seal, Uni-directional groove, Bi-directional grooveAbstract: The performance of dry gas seal is simulated by using Computational Fluid Dynamics. The effect of gas flow state on the seal performance is analyzed under different gas film thickness.The Laminar model and k-ε RNG turbulent model are used separately to obtain the opening force, leakage rate and stiffness film.The geometric model of the problem that includes a rotating ring and a fixed ring, was obtained.The grooves of the rotating ring in order to compress the flow. Therefore, the computational area is gas film between two ring and the film gas into the groove. Then the computational domain transfrerred to generate computational mesh software. For the computational domain have been used structure hexahedron cells. According to the results, it was found for all three geometric model that dry gas seal works in laminar flow. For uni-directional optimized geometric parameters are α=15, ξ=1.25 and γ=0.4 Obtained. where α is the groove angle, ξ is the ratio of groove with to the land with(circumferential) and γ is the ratio of dam length(radial).the effect reverse speed on the performance dry gas seal is analyzed. The results showed that the opening force reduces 8% while rate leakage increases 0.38%. Therefore we use the bi-directional groove. For bi-directional groove the two geometric models is analyzed. The results showed that the first geometric model is better than the second geometric model.
UNCONTROLLED SUBJECT TERMS
Subject Term
پایان نامه کارشناسی ارشد
Subject Term
دانشکده مهندسی
Subject Term
مهندسی مکانیک
Subject Term
تبدیل انرژی
PERSONAL NAME - PRIMARY RESPONSIBILITY
سجادیان، زهرا
PERSONAL NAME - SECONDARY RESPONSIBILITY
صفاریان، محمدرضا، استاد راهنما
بحرینیان، سیدسعید، استاد مشاور
ORIGINATING SOURCE
Country
ایران
LOCATION AND CALL NUMBER
Call Number
پ،۱۴۲۵۵،م،۱۳۹۴
p
TF
92029
1
a
Y
