Apr 14, 2017 this video created on my friends request. Design, fabrication and analysis of an electric ducted fan. To keep the duct benefits, we now use edf electric ducted fans for our new prototype, named safly. With the increase in the uav market there is now more demand for small scale electric ducted fan edf propulsion systems. A ducted fan is a propulsion arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct.
An electric ducted fan design library written in pythonblender api. Ducted fan uav modeling and simulation in preliminary design andy ko, osgar john ohanian and paul gelhausen avid llc, blacksburg, va, 24060 with the emerging need for unmanned aerial vehicle with the capability to hover, the ducted fan uav design is becoming a more acceptable design option over the conventional rotorcraft design. Whilst the main applications of these acoustic impedance concepts have been in reactive silencer design, an impedance model of a ducted fan as been given by baade where it is considered as a dipole source of noise with. Forwardcurved fans are used in clean environments and operate at lower temperatures. The hyperflow has been designed to be most efficient while flying.
Electric ducted fan theory page 1 of 17 electric ducted fan theory this paper describes a simple theory of a ducted fan. Double ducted fan ddf by cengiz camci and ali akturk. Pdf modeling of ductedfan and motor in an electric. The air is pressurized by the aerodynamic lift generated by the fan blades, much like a propeller and an airplane wing. The current concept uses a secondary stationary duct sys. Ultra and very light ducted fan propulsion system complex design optimization daniel hanus, robert theiner, erik ritschl department of automotive and aerospace engineering, faculty of mechanical engineering, czech technical university in prague, karlovo nam. It allows you to choose between the original 1kv motor and the new 00kv motor. Would a ducted fan with a nozzle like a jet engine have. The duct reduces losses in thrust from the tips of the propeller blades, and varying the crosssection of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to bernoullis principle. Welcome to the exciting world of electric ducted fans edf. Figure 2 illustrates the hoveraxial flight and forward flight test orientations. The complex flow interactions between the rotor, shroud and nacelle hinder the design of optimal lifting duct shapes. Ceilingmounted ducted exhaust fan exhaust fans cef3040 series electrical accessories the clipsal brand is part of schneider electric.
The fan performance chart shows performance curves for a series of fan speeds. Ultra and very light ducted fan propulsion system complex design optimization daniel hanus, robert theiner, erik ritschl department of automotive and aerospace engineering, faculty of mechanical engineering, czech technical university in prague. An edf thrust tube is placed at the rear of the fan and extends to the very end at the exhaust side of the jet. Aerodynamic design of ducted propeller typically consists of four phases. Likewise, there are far fewer flying examples of ducted fans than of props in ga aircraft. Factors which determine the performance of the fan include the number and shape of the blades. What is the highest possible thrust generated by 15cm ducted fan. Introduction a fan is a device that utilizes the mechanical energy of a rotating impeller to produce both movement of the air and an increase in its total pressure. The most complete reference for model ducted fan design that i have seen is the book by dipl. Pdf electric ducted fans with high power density are widely used in hybrid aircraft, electric aircraft, and vtol vehicles. The uniquely clear style of writing simplifies this complex subject and makes it easy for you to understand. Edf duct design handbook the edf duct design handbook is a new and valuable resource for edf modelers at all levels. A ducted fan usually runs at higher rpm than a bare propeller, which helps to make the ducted fan a good match for a high speed engine.
This paper introduces the ul39 project, an ultralight aircraft with a ducted fan, and some of the problems that have arisen in the course of its development. Axial flow fans counterrotating propellers electric ducted fans edfs geared turbofans gtfs open rotors propfans turbofans both rotors and. The hyperflow is a new edf design created by great planes using the latest technology to. Usd862361s1 us29644,259 us201829644259f usd862361s us d862361 s1 usd862361 s1 us d862361s1 us 201829644259 f us201829644259 f us 201829644259f us d862361 s usd862361 s us d862361s authority us united states prior art keywords ducted fan flying machine fan flying view left side prior art date 20180416 legal status the legal status is an assumption and is not a legal. Introduction the concept of ducted fans as a suitable propulsive. Shaft housing side panel housing scroll cutoff impeller. This paper covers an overview of the design and fabrication process as well as performance and acoustic testing of a 0. The fan was driven by a 125 hp, watercooled, electric motor through two rightangle gearboxes. A flexible duct design and 150pa external static highpressure are. With mitsubishi electric ducted inverter systems, climate control is at the touch of a button. Jet hanger hobbies have been involved in the design and flying of jets for a long time. Because of this, fans are designed with a particular duct profile in mind and a particular flying speed.
A thrust tube is used to control the surface area of the air escaping out the back of the ducted fan jet. Rc airplane ducted fan units horizon hobby by eflite fms. Ducted fan uav modeling and simulation in preliminary design andy ko, osgar john ohanian and paul gelhausen avid llc, blacksburg, va, 24060 with the emerging need for unmanned aerial vehicle with the capability to hover, the ductedfan uav design is becoming a more acceptable design option over the conventional rotorcraft design. Propeller fan and duct is designed using basic principles of blade element theory and momentum theory. Electrical accessories ceilingmounted ducted exhaust fan. Nov 25, 2015 this is a new design for a 120mm single stage edf. Electric ducted fan design electric ducted fan jet.
Clipsal by schneider electric clipsal by schneider electric the cef40 easy installation highperformance centrifugal fan. Pdf electric ductedfans with high power density are widely used in hybrid. A thrust tube can provide many benefits but does share trade offs. With the emerging need for unmanned aerial vehicle with the capability to hover, the ducted fan uav design is becoming a more acceptable design option over the conventional rotorcraft design. I will answer to any questions regarding this video in comments section. The duct reduces losses in thrust from the tips of the props, and varying the crosssection of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to bernoullis principle. Because of their simple design, radial fans are well suited for high temperatures and medium blade tip speeds. Unmanned air vehicle uav ducted fan propulsion system design and manufacture submitted by wah keng tian department of mechanical engineering. At fan speed n1, the fan will operate along the n1 performance curve as shown in figure 5. Ducted fan project gutenberg selfpublishing ebooks.
The pdf file applications of ducted fans gives some very good general information on the basics of ducted fan design. To your point that turbofan bypasses dont have a nozzle because of the hot exhaust would mean that something like the airbus e fan should have strongly. These measurements allow us to help customers designselect the quietest propellerducted fan possible for their vehicle. If the ducted fan performance can be expected to achieve 9095% of that of the propeller, than i will likely try a ducted fan for my cozy mark iv project. The wind tunnel turntable provided the duct angle of attack changes. Return to mass flow page return to autodidactics home page email link. The fans actual operating point on this curve will depend on the system resistance. Vrnak national aeronautics and space administration glenn research center cleveland, ohio 445 summary the nasa john h.
Ducted fan uav modeling and simulation in preliminary design. Ducted fans are favoured in vtol and other lowspeed designs for their. The edf ducted fan design handbook covers all aspects of edf ducting. Radial fans are industrial workhorses because of their high static pressures upto 1400 mm wc and ability to handle heavily contaminated airstreams. Getting ducting wrong can completely spoil the performance of an otherwise excellent airframe and fan unit combination. Performance study of a ducted fan system push design. Hoveys book hovey, 1977, duct for the propulsion system is designed. Tests are, therefore, necessary in all four categories from which it may be possible to identify those fan designs that are installation sensitive. When i was badly bitten by the edf bug and started searching the internet for.
The duct is designed to be 3d printed and assembled in house. Ways of reducing noise of a ducted fan aircraft propulsion unit. It is assumed that the reader knows what it is an electric ducted fan edf, how it works, and what it is good for. With an onsite acoustic chamber and acoustic testing instruments, we can measure and compare the acousticnoise signature of di.
Commercial unhooded electric cooking appliances 34 miscellaneous appliances. Ducted fan test in the nasa ames 7 by 10 foot wind tunnel. A ducted fan is a propulsion arrangement whereby a propeller is mounted within. Development of a dynamic model of a ducted fan vtol uav. The aerodynamic analysis, preliminary and detailed design, of this ducted fan vtol uav, is the first. The fan design considers aerodynamic, acoustic performance, and structural considerations for a balanced, optimized design that can be tailored to the customers specifications and priorities. In general, conventional compressor stages are designed by the. Much less design information is available for ducted fans than is available for props. We used this and the 1kv motor for a ducted fan outlaw pinewood derby car. Volume 1 propulsion physics and design of fans and longchord ducts red.
The design goal is to produce an efficient electric ducted fan design that can produce 2 kg equivalent maximum thrust with an overall diameter including the duct of 10 inches. Development of a 32 inch diameter levitated ducted fan. Read online ducted fan design volume 1 and download ducted fan design volume 1 book full in pdf formats. Avid designs ducted fan propulsors for all types of vehicles from backpackable hovering uavs, to fixed wing hale concepts. The system performed well and was only outdone by a 54 mm fan.
The ducted fan coil unit pearp170200250 has a twopiece construction. A ducted fan is an air moving arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. This allows separation of the indoor unit heat exchanger and the fan deck assembly for easier. Read download ducted fan design volume 1 pdf pdf download.
Development of a dynamic model of a ducted fan vtol uav a thesis submitted in fulfillment of the requirements for the degree of master of engineering hui wen zhao b. The hyperflow is a new edf design created by great planes. A ducted fan will be quieter for a given power level. Development of a 32 inch diameter levitated ducted fan conceptual design dennis j. Content management system cms task management project portfolio management time tracking pdf. The eturbax electric ducted fan unit is 5 14 inches3.
As edf plane designs and equipment has improved planes are able to take off from a ground run as is normal for other model aircraft. Preliminary results showed that the computational fluid dynamics cfd program could be used as an 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. Since the efficiency of a ducted fan is 2w0w9w0 where w0 is the speed of the ambient air and w9 is the exit velocity of the ducted fan, increasing the exit speed with a nozzle would lower the efficiency. In the video i will show how to design a ducted fan in solidworks. The cef series has a flexible design that allows it to be mounted in a.
There are, however, enough good sources of information and tools to get started. A ducted fan requires a significantly different duct design approach than does a turbine engine. The fan consists of a highefficiency electric motor with a 6inch diameter blade, capable of generating up to 9 newtons of thrust. In the present work, simple design, analysis and fabrication of ducted fan is performed. Design, fabrication and analysis of an electric ducted fan parthasarathy vasanthakumar. Join the jet age with a smooth running, powerful electric ducted fan unit. The fan is designed to produce a pressure difference, and hence force, to cause a flow through the fan. Engineering cookbook a handbook for the mechanical designer third edition. If you have any questions or comments about this design, please feel free to email me.
The edf ducted fan design handbook will provide you with an excellent grounding in the duct design principles necessary for your edf model to make the most of the power of your fan unit. Design and analysis of ducted fan for multirotor vtol uav. The fan design considers aerodynamic, acoustic performance, and structural considerations for a balanced, optimized design that can be tailored to. Glenn research center has developed a revolutionary 32 in. The most important difference between a ducted fan and an open rotor is that. School of aerospace, mechanical and manufacturing engineering college of science, engineering and health rmit university august 2009. Ing heinrich voss titled impeller, published by neckar verlag gmbh in 1989 isbn 3788306181. The purpose of these nptes is to provide a basis for dlsoussion on the relative morlts of the two methods. This is clearly an o design condition for an axial ow fan that is. Mosups program is a unique concept of a joined wing aircraft utilizing a ducted fan in a pusher configuration fig. Using some ofthe formulas in andy lennons book i have come up with a weight of about 9 9.
However, with current technology, ducted fan configuration engines are the only feasible option when it comes to combustion free propulsion system which are already being used in many unmanned drones and unmanned aerial vehicles. As the fan rotates and draws air, the surrounding duct causes the airflow to accelerate through the fan and exit out of the exhaust tube. Assuming you design your fan for high static thrust. Although they can sometimes be used interchangeably with centrifugal fans, axial fans are commonly. Unmanned air vehicle uav ducted fan propulsion system. Presents a simplified method of designing ducted fans for light aircraft propulsion. A guide to duct design for electric ducted fan edf power. Primarily for low pressure, high volume, nonducted applications cutaway view fan basics. A technique for shape optimization of ducted fans iowa state. Rc airplane ducted fan units horizon hobby by eflite. Pdf flying wing with electric ducted fan edf propulsion. Pdf modeling of ductedfan and motor in an electric aircraft and. This is certainly one of the largest units available.