نتایج جستجو برای: axial-flow compressor

تعداد نتایج: 529095  

The performance prediction of axial flow compressors at different speeds and under various pressure ratio conditions are still being developed because of costly empirical experiments. One-dimensional modeling is a simple, fast and accurate method for performance prediction in any type of compressor with different geometries. In this approach, inlet flow conditions and compressor geometry are kn...

Journal: :journal of mechanical research and application 2011
mohammad eftari hamid javaniyan jouybari majid reza shahhoseini farhad ghadak manuchehr rad

design models of multi- stage, axial flow compressor are developed for gas turbine engines. axial flow compressor is one of the most important parts of gas turbine units. therefore, its design and performance prediction are very important. one-dimensional modeling is a simple, fast and accurate method for performance prediction of any type of compressors with different geometries. in this appro...

Farhad Ghadak Hamid Javaniyan Jouybari Majid Reza Shahhoseini Manuchehr Rad Mohammad Eftari

Design models of multi- stage, axial flow compressor are developed for gas turbine engines. Axial flow compressor is one of the most important parts of gas turbine units. Therefore, its design and performance prediction are very important. One-dimensional modeling is a simple, fast and accurate method for performance prediction of any type of compressors with different geometries. In this appro...

Journal: :روش های عددی در مهندسی (استقلال) 0
احمدرضا عظیمیان a. r. azimian

in this paper it is attempted to investigate the behavior of an inviscid flow in the meridional plane of an axial flow compressor. for this purpose the 3-d unsteady euler equations in cylindrical coordinate are averaged in tangential direction. therefore, the equations are reduced to a 2-d system. by averaging the tangential component of momentum equation, a blade force will result. axial and r...

Hadi Karrabi, Meysam Sajjadi Mostafa Baghani

The Axial compressor is an integrated part of a gas turbine. The central part of compressors is its blades. Blade aerodynamic has a significant effect on compressor performance. Because of the adverse pressure gradient in the compressor, any deviation in the blade profile has a significant influence on the flow field as well as the compressor performance. During the manufacturing and operation ...

A. R. Azimian,

In this paper it is attempted to investigate the behavior of an inviscid flow in the meridional plane of an axial flow compressor. For this purpose the 3-D unsteady Euler equations in cylindrical coordinate are averaged in tangential direction. Therefore, the equations are reduced to a 2-D system. By averaging the tangential component of momentum equation, a blade force will result. Axial and r...

2015
George Kopasakis Joseph W. Connolly Larry Cheng

This paper covers the development of stage-by-stage and parallel flow path compressor modeling approaches for a Variable Cycle Engine. The stage-by-stage compressor modeling approach is an extension of a technique for lumped volume dynamics and performance characteristic modeling. It was developed to improve the accuracy of axial compressor dynamics over lumped volume dynamics modeling. The sta...

A. R. Azimian,

In this paper it is attempted to investigate the behavior of an inviscid flow in the meridional plane of an axial flow compressor. For this purpose the 3-D unsteady Euler equations in cylindrical coordinate are averaged in tangential direction. Therefore, the equations are reduced to a 2-D system. By averaging the tangential component of momentum equation, a blade force will result. Axial and r...

2016
M. Umer Sohail

Control and Modeling for stall and surge phenomenon in axial flow compressors have received great importance in recent times. In power generation plant and aerospace propulsion compression system are prone to the aerodynamic instabilities of stall and surge. In aero engine compressors higher pressure ratio has always been a growing stipulates which has over involved by diverse rotating stall an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی هوافضا 1385

این پایان نامه در راستای بهینه سازی عملکرد کمپرسور تدوین شده است برای این منظور از دو ابزار استفاده شد ابتدا یک روش برای حل جریان در کمپرسور (روش انحنای خط جریان )انتخاب شد در ادامه از روش تصویر گرادیان به عنوان یک روش بهینه سازی استفاده شد پارامتری که می بایست بهینه شود مقدار راندمان می باشد با افزایش مقدار راندمان ، کار مصرفی کمپرسور کاهش می یابد نسبت فشارثابت کل کمپرسور و مقادیر دی هالربزرگت...

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