پديد آورنده :
انصاري پور، محمد حسين
عنوان :
بررسي تجربي و عددي كاربرد افزاينده هوايي به عنوان سامانه پيش رانش آبي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
تبديل انرژي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
[هشت]،55ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
علي اكبر عالم رجبي
توصيفگر ها :
عملكرد آيي , شبيه سازي عملكرد , نويز
تاريخ نمايه سازي :
4/8/90
استاد داور :
سعيد مرتضوي، محسن ثقفيان
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
An Experimental and Numerical Investigation of the Usage of Air Amplifier as a Marine Thruster Mohammad Hosein Ansaripour Hosein ansaripour@yahoo com 2011 05 17 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc language FarsiSupervisor Ali Akbar Alemrajabi E mail rajabi@cc iut ac irAbstractNowadays air amplifier is used as a blower or sucker in different branches of industry With theadvent of some compressed air into this device air pressure greatly decreases and its velocityincreases leading to suction of a great volume of air up to 20 times of the volume of theconsumed air into the device and under the influence of the Coanda effect exits from the otherside If this device can function similarly in water it could be used as a marine thruster systemwith many advantages Among the most important of these advantages are as fallow it onlyneeds a pump not a power plant to drive the marine system There would be much flexibility inthe placement of the pump in the marine vehicle Moreover Power Transmission between thepower plant and the propulsion system and also the problem of sealing of the Power Transmissionshaft will be omitted It is expected that this new propulsion system to produce much lower noise It also would need much less maintenance effort On top of these advantages is the enhancedmanoeuvrability of the marine system Finally it has no rotating vane therefore hazard ofcollision with external objects reduces In this research application of this device as a marinethruster was studied To accomplish this effect of a few parameters on its performance wasinvestigated experimentally The independent variables in conducting this investigation includethe size of gap and rate of water flow into it The dependent variable is the thrusting forcedeveloped by the device The experiment was conducted for 9 different gap intervals and fivedifferent flow rates Subsequently in the second phase of the project a numerical model of the airamplifier was developed and its performance in water was simulated using the Fluent software Afterwards the results obtained from the numerical modeling were compared with those of theexperimental data A rather close agreement was observed between them It was concluded thatnumerical modeling of such systems can be done accurately and results obtained from suchsimulation may be considered as reliable The findings of this study demonstrated that the airamplifier performs to a great extent similarly in water and air The flow rate sucked in can be asgreat as 145 times the flow rate pumped in to the device The results show that there is anoptimum gap for the device at which its thrust per unit consumed energy is a maximum Moreover the optimum thrust force per unit consumed power for this device was 0 15 Newtonper watt which is comparable with those of propellers i e 0 15 to 0 2 This demonstrates thatthis device can compete with other thrusting systems Key words Air amplifier thrust force numerical experimental water noise
استاد راهنما :
علي اكبر عالم رجبي
استاد داور :
سعيد مرتضوي، محسن ثقفيان
