Oct 30, 2015 the book is 168 pages long, 33 of which are about design pages for duct design, 14 pages for fan design, and 6 pages for an example. Qualifies for free shipping fms ducted fan with kv3900 motor, 64mm fmmdf004. Sep 28, 20 the ducted fan power package described here was conceived as being interchangeable between several models and suitable for free flight, control line and radio control use. We begin by looking at a ducted fan operating statically zero freestream velocity or airspeed.
The market is chock full of computer optimized designs for both internal combustion engines and electric motors, using some of the most advanced materials for construction. The system performed well and was only outdone by a 54 mm fan. The current concept uses a secondary stationary duct sys. Pdf superconducting ducted fan design for reduced emissions. Performance study of a ducted fan system push design. The pdf file applications of ducted fans gives some very good general information on the basics of ducted fan design. Unmanned air vehicle uav ducted fan propulsion system design and manufacture submitted by wah keng tian department of mechanical engineering. These fan are not like the old fan with 90duct fan eng and fiberglass planes that had no foam to cover the whole fan. When i was badly bitten by the edf bug and started searching the internet for. A high thrust and well designed electric ducted fan unit for high power applications, the 12 blade arrangement makes for a quiet fan unit with an amazing sound, this is the closest you will ever get to the sound of a turbine.
The new concept that will signi cantly reduce the inlet lip separation related performance penalties in the forward ight zone is named double ducted fan ddf. In 5 and 6, the effects of crosswinds on the aerodynamics of a ducted fan vehicle are discussed. The hyperflow was created with ease of use in mind, as well as superior performance using either a brushed or brushless motor. Because of this, fans are designed with a particular duct profile in mind and a particular flying speed.
With this in mind, fans are designed with a particular duct pro. The design was then modified to adapt to the low fan pressure ratio operation of a. We now have the propulsive basis for hummingbirds duct design. I hope the formatting works in your browser, as it is rather a bear to convert. 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. Hovercraft ducts the duct myths, duct physics tips and. Development of a dynamic model of a ducted fan vtol uav. Results show that compressibility effects on performance are significant when the blade tip mach number is greater than 0. Avid designs ducted fan propulsors for all types of vehicles from backpackable hovering uavs, to fixed wing hale concepts. Just got mine and did some testing on it it is indeed a good edf for the price of that size no question about it. It is assumed that the reader knows what it is an electric ducted fan edf, how it works, and what it is good for. At the same time, of course, we must design the duct to function efficiently as an annular wing. Hoveys book hovey, 1977, duct for the propulsion system is designed. The goal of this effort was to determine the duct performance for variations of fan and duct geometry, for axial and.
The hyperflow has been designed to be most efficient while flying. 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. Return to mass flow page return to autodidactics home page email link. Experimental and computational assessment of a ductedfan rotor flow model ali akturk.
If you have any questions or comments about this design, please feel free to email me. Here ill attempt to design a ducted fan for a cozy mark iv powered by a converted automotive engine mazda b. Experimental simulation of ducted fan acoustics at very. Oct 16, 2003 neu motor ducted fan 14151y with phoenix ice 100 and wemotec 90mm fan. 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 the edf ducted fan design handbook covers all aspects of edf ducting. This article introduces a new conceptual design tool for an environmentally sustainable method of aeropropulsion. I build it to be robust, change the turbine design and have settled on a air foil design for the fins. Experimental and computational assessment of a ducted. 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. Made with 30% frp, the individual blades are not only able to absorb high power, high rpm motor set ups, this. Their ducted fan system was designed by using the streamsurface based axisymmetric analysis. Buy 64mm ducted fan set 5 blades electric edf with 34s motor kv4300 for rc models. Rc airplane ducted fan units horizon hobby by eflite fms. Electric ducted fan theory page 1 of 17 electric ducted fan theory this paper describes a simple theory of a ducted fan.
Ducting design the design of the ducting in an electric ducted fan edf model is a most important issue to get right if the model is to fly well. 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. Ducted fan advantages and disadvantages introduction the use of a duct on a fan or propeller is known to provide advantages and. I see all you guys,putting this thing on the bench and test. This code was validated using data from many windtunnel and. Experimental and computational assessment of a ductedfan. An electric ducted fan design library written in pythonblender api.
Rc airplane ducted fan units horizon hobby by eflite. Eflite bl180m ducted fan motor,500kv, 170mm wire eflm30180mdfd. Overall rating is only for that motor housing other wise it could be all 5 crowns. A wide variety of electric ducted fan options are available to you, such as ccc, ce, and csa.
Pdf flying wing with electric ducted fan edf propulsion. Ducted fan design this is a mathcad document converted into html. Ducted fans for model jets paperback september 1, 1989. It allows you to choose between the original 1kv motor and the new 00kv motor.
Ducted fan spare parts replacement rotors 50mm to 105mm default name a z name z a price low high price high low rating highest rating lowest model a z model z a. Designing a ducted fan, february 1971 american aircraft. As the fan rotates and draws air, the surrounding duct causes the air. If you could design a fan that woudl accelerate the air just as much, at that rpm, youll still need brushless power. The flying platform a testbed for ducted fan actuation. 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. As a result ducted fan vtol uav stability and control abilities are attracting further research and development. Poor duct design can spoil the performance of an otherwise excellent airframe and edf unit. Various design elements of the rotor and stators were extracted from published reports, particularly refs. Tiltrotor ducted fans and their applications jacob a.
For many years it has not been necessary to design and build your own ducted fan unit. Cp 10 blade rotor with metal spinner cpcs 70mm 10b rotor. Flight dynamics is concerned with the motion of an airplane due to internally or externally generated disturbances. Stator design for optimum combined performance and increased thrust. 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. The rest of the book is filler, with great pictures of airplanes, blimps and hovercraft, and discussions about useful engines just fyi, wankel rotary, electric motors, and diesel engines are all absent. Ul39 ducted fan propulsion unit were first used in turbofan engine fan design and development. Fan swept area exhaust the way a ducted fan works is simple. Therefore, the rotorstator configuration is only taken into account in the studies referred to. The installation of the unit in the model requires only that the aft edge of the can be a snug slip fit into the forward end of the tailpipe, with the forward portion of the.
The ducted fan should be well suited for this task for many reasons. But i wish haoye co could make the front motor housing much more thicker more material added then it would be strong enough to handle the rite motor for bigger jets. Designing a ducted fan february 1971 american aircraft modeler. The first ducted fan system was an aviation related fanindisk configuration which consisted of a circular duct, center cabin, fan and stators. Unmanned air vehicle uav ducted fan propulsion system. Design and analysis of ducted fan for multirotor vtol uav. Wilroy university of alabama, tuscaloosa, al 35487. Hello everybody, im trying to build a impeller fan myself because the regular ones are. Ways of reducing noise of a ducted fan aircraft propulsion. Aerodynamic design of ducted propeller typically consists of four phases. This code was validated using data from many wind tunnel and. During the future development of the ul39 propulsion unit, advantages and disadvantages of the.
Flying wing with electric ducted fan edf propulsion. The edf ducted fan design handbook covers all aspects of edf ducting. The first and foremost will be to provide safety for the personnel handling the uav by preventing any physical contact between the human and the propeller rotating at high speed. The book is 168 pages long, 33 of which are about design pages for duct design, 14 pages for fan design, and 6 pages for an example. The ducted fan of reference 4 for the same exit area power loading shpae 28. Ducted fan uav modeling and simulation in preliminary design. It is apparent that with the shroud designed for cruise, performance at freestream velocities greater than 100 knots did not decrease from the. Avid oav is a design and modeling software tool for ducted fan vehicles that is capable of modeling the performance and flight dynamics during the conceptual and preliminary phases of vehicle design. The hyperflow is a new edf design created by great planes using the latest technology to fit onto smaller edf airplanes. A ducted fan requires a significantly different duct design approach than does a turbine engine. Electric ducted fan edf models part 2 ducting design. C031562 ductedfanbased vertical andor short takeoff and landing uninhabited aerial vehicles are frequently encountered in aeronautical applications. We used this and the 1kv motor for a ducted fan outlaw pinewood derby car.
The aerodynamic analysis, preliminary and detailed design, of this ductedfan vtol uav, is the first. There are some obvious shortcomings to some of these calculations. 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. I will instead try to keep the source mathcad file up to date. According to this simplified approach, for a ducted fan system operating statically, net pressures on the duct inner surface will contribute to thrust if the inlet area is larger than the outlet area called positive camber. Volume 1 propulsion physics and design of fans and longchord ducts. Assessment of fan shape and rpm impact on performance, weight, maneuverability, and radiated noise. Furthermore, it was extensively used in the design of commercial ducted fans. Ducted fan design the specifications of the ducted fan are summarized in table 1, and several views of the design are shown in figs. 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. Ways of reducing noise of a ducted fan aircraft propulsion unit. Turner in general, conventional compressor stages are designed by the cascads method, while high stagger low solidity ductcd fans are designed on modified isolated aerofoil theory. Trade studies to develop the best fan for integration with the vehicles other components such as engine mounting struts. A duct will have a stabilizing affect in the aft position.