Aungier this book provides a thorough description of an aerodynamic design and analysis systems for axialflow compressors. Aer56 the design and performance of an axialflow fan. Research and development of a high performance axial compressor kato dai. There are basically two types of performance analysis techniques in common use. The design of an axial flow fan for application in large aircooled heat exchangers. In practical situations, the velocity of the air stream is not uniform across the cross section of a duct. An axial fan is a type of a compressor that increases the pressure of the air flowing through it. Numerous chapters cover topics such as compressor design, ptotential and viscous flow in two dimensional cascades, compressor stall and blade vibration, and compressor flow theory. A strategy for aerodynamic design and analysis aungier, ronald h. Pdf the design of an axial flow fan for application in.
The blades have been designed for optimal performance, for both aerodynamic needs as well as noise characteristics. Types, performance evaluation, efficient system operation, flow control strategies and energy conservation opportunities 5. Friction slows the air moving close to the walls, so the velocity is. Investigation of an innovative nonfree vortex aerodynamic. In aerodynamic design, computational fluid dynamic analyses cfd are. Chapter xiv summarizes design methods and theories that extend beyond. Design of highly loaded axialflow fans and compressors, hanover, nh. Structural and conceptual design analysis of an axial. A wide variety of aerodynamic fan options are available to you, such as 2 years. The flow coefficient andor pressure coefficient moved in the range of 0. The compressors in most gas turbine applications, especially units over 5mw, use axial. Typical design efficiency of aerofoil fan handling clean air is.
The axial fan reaction and the vector diagram the work and flow coefficient diagram. Q is flow volume, a is impeller area, d is impeller diameter. Aeropropulsion unit axial flow compressorsoff design performance 2005 2010 international school of engineering, chulalongkorn university regular program and international double degree program, kasetsart university assist. Three blading designs of high pressure ratio axial flow fan with hubtip ratio of 0.
However, to an increasing extent, computational fluid dynamic cfd methods. To that end a series of fans has been designed and built to obtain definitive informa. Axial flow fan tip leakage flow control using tip platform extensions. Loss reduction in axialflow compressors through lowspeed model testing. This new edition is updated throughout to cover new regulations and technology relevant to compressors, with new content adding coverage of strings of equipment, including gas turbines. This paper deals with the design and performance of an axialflow fan for comparatively high pressures. Page 6 of 35 the basics of axial flow fans typical aircooled heat exchanger fan fig. The thermodynamic design analysis is used to determine the mass flow, pressure ratio and temperature distribution through the gas path.
Fans, blowers and compressors are differentiated by. Energy performance assessment of fans and blowers bureau of energy efficiency 91 traverse readings. Benini 17 developed a method for multiobjective design optimization of a transonic compressor and obtained the optimal rotor con. Aerodynamics for the user, third edition continues the books 25 year history as a trusted reference on compressor design and maintenance. An aerodynamic method to design lowspeed axial fans with. The lewis research program on axialflow fans and compressors for advanced airbreathing engines is directed primarily toward reducing the size and weight of the fans and compressors while maintaining a high level of performance. The partspeed operating problem in highpressureratio multistage axialflow compressors is analyzed in chapter xiii. The blades of the axial flow fans force air to move parallel to the shaft about which the blades. This book provides a thorough description of an aerodynamic design and analysis systems for axialflow compressors. Aircraft propulsion axial flow compressors off design performance 1. Offdesign computer code for calculating the aerodynamic performance of axialflow fans and compressors users manual james e schmidt nyma, inc. The fan is designed to produce a pressure difference, and hence force, to cause a flow through the fan. Bowman senior engineering consultant, rotaryreciprocating compressor division, ingersollrand co. Highlight the specific differences between fan, blower and air compressors.
Aerodynamic design and performance cranfield series on turbomachinery technology mckenzie, a. This thesis consists of aerodynamic design of closed circuit, double return vertical wind tunnel with a flight section that can accommodate four paratroopers, aerodynamic design of a rotor straightener configuration axial flow fan and running cfd analysis of the axial flow fan for different operating conditions by fluent software. These include optimum values of axial flow velocity, blades hub to tip ratio, rotational speed, blades degree of reaction, stage work done factor, haller number, stage the blades tips. Offdesign computer code for calculating the aerodynamic. The main factors affecting the performance of fans are flow, pressure, temperature, speed and. The frp fans offer certain critical advantages like optimal aerodynamic design of fan impellers to provide higher efficiency for any specific application, reduction in overall weight of the fan, thereby extending the life of mechanical drive systems, requires lower drive motor rating and light duty bearing system, low power consumption resulting in appreciable energy savings. Karassik late senior consulting engineer, ingersolldresser pump co. Although they can sometimes be used interchangeably with centrifugal fans, axial fans are commonly.
Performance analysis and aerodynamic design of axial flow. The end result of the design calculations shows that five stages were necessary in order for34. The effects of radially distorted incident flow on performance of axialflow fans with forwardskewed blades. Aircraft propulsion axial flow compressors off design. Steinke lewis research center summary the overall and the bladeelement performances and the aerodynamic design parameters are presented for a 1. An offdesign axialflow compressor code is presented and is available from. Aerodynamic design and performance cranfield series on turbomachinery technology.
Chapters xi to xiii concern the unsteady compressor operation arising when compressor blade elements stall. The book includes practical emphasis on design problems, experimental facilities and data analysis, together with some design examples and novel concepts. Design of axial flow fans with high aerodynamic loading. Research on threedimensional blade designs in an ultrahighly. The blading tests proved maximum efficiency over 90% in all.
Axial flow fan tip leakage flow control using tip platform. The air is pressurized by the aerodynamic lift generated by the fan blades, much like a propeller and an airplane wing. Provides readers with an understanding of aerodynamic design and performance of fans and compressors. Aer56 the design and performance of an axialflow fan lionel s. Brook park, ohio nasacr198362 offdesign n9612502 coluiquter code for calculating the aerodynahic performance of axialflow fans and cowressors unclas final report pdf version also available for download. Aerodynamic performance analysis axialflow compressors. Fans may also be classified into two major types with reference to their mechanical design. Research and development of a high performance axial. The design and performance prediction of axial flow compressors and turbines has been based, in the main, upon measurements of the flow through twodimensional cascades of blades.
Cosmic for predicting the aerodynamic performance maps of fans and com. Theoretical model for predicting axial fansblowers performance characteristics 3 l l 2 l 2 m v w2 r 2 m v w1 r 1 m v w2 r 2 3 m av f q, q av f m3s and a 4 2 d 2 1m2 m, is a constant mass flow rate between entry and exit. Fans and blowers bureau of energy efficiency 93 syllabus fans and blowers. The results, presented, however, should be applicable to any class of axialflow compressors. A key result of the iterative design process is the determination of flow splitting between the two compressors which is selected to be 7030 between the compressor and the recompressor.
Aerodynamic design study of advanced multistage axial compressor. Aerodynamic design and analysis of a lowreaction axial. An axial fan is a type of fan that causes gas to flow through it in an axial direction, parallel to the shaft about which the blades rotate. An overview of aerodynamic systems design of axial flow compressors is presented.
Factors which determine the performance of the fan include the number and shape of the blades. However, to an increasing extent, computational fluid dynamic cfd methods are now being used to simulate cascade testing. An aerodynamic performance analysis is essential for nearly all aspects of axialflow compressor aerodynamic design and application. Quiet by design the entire range of exhaust fans is. It describes the basic fluid dynamic and thermodynamic principles, empirical models and numerical methods used for the full range of procedures and analytical tools that an engineer needs for virtually any type of axialflow compressor, aerodynamic design or. Axialflow compressors an overview sciencedirect topics. It describes the basic fluid dynamic and thermodynamic principles, empirical models and numerical methods used for the full range of procedures and analytical tools that an engineer needs for virtually any tupe of axialflow compressor, aerodynamic design or analysis activity. Investigation of axialflow fan and compressor rotors designed for. This should include, the wiley titles, and the specific portion of the content you wish to reuse e. Axialflow ventilation fan design through multiobjective.