Aerodynamics Definition and 251 Threads

Homework Statement prove that with flow in a corner, with stream function ψ=Axy, particles are accelerating per \frac{DV}{Dt}=(A2(x2-y2))/r; A=const; r-distance from the center of the corner Homework Equations Vx=U=\frac{∂ψ}{∂y} . . Vy=V=-\frac{∂ψ}{∂x}...

I have been wondering lately, is the field of Data Science/Big Data used in the field of Aerodynamics? I know that Data Science has found great uses in areas like bioinformatics, finance, social media and sports. I am asking because the two fields I have grown interest in them. If you work in...

Homework Statement A tailless aircraft of 9072kg mass has a delta wing with aspect ratio 1 and area 37m2. Show that the aerodynamic mean chord of a delta wing, \frac{\int_0^{b/2} c^2 dy}{\int_0^{b/2} c\ dy} is two-thirds of its root chord and that for this wing it is 5.73m. Homework...

As you can see, around Reynolds number of 5 105 the transition occurs for a smooth sphere. However, why is it that after this transition that the drag coefficient increases at turbulence?

Why is it important to ensure flow separation does not occur in the back of a vehicle or wing? I know that when flow separation occurs its when you have a large differential pressure which in turn cause turbulence and drag. I understand that with more drag you have less efficiency. But if...

In layman's terms why does a projectile that spins axially travel "true"?

Hello! I have some questions about the drag equation and aerodynamics: F = \frac{1}{2}ρv^2CA I'm trying to calculate the atmospheric drag on a streamlined body (the drag coefficient will be a very small number) with a velocity of about 8 km/s at about 38,000 meters altitude, where the...

How fast does an air molecules velocity through an electrostatic field have to be to induce ionization? Stated simply, how much friction is needed to cause ionization. Is it possible to factor in velocity, temperature(at room temperature), and strength of the static field, using a math...

Aerocapture: Aerodynamics OR Aerodynamic Heating OR High-Altitude Atmospheric Model I apologize for the many topics covered at once here, but, this is why: I'm trying to design a vehicle to make aerocaptures from Earth to Mars, and from Mars to Earth (I do these kinds of things quiet a lot...

Hi everyone, first off i'd like to thank you all for maintaining this awesome forum, seems really cool :D I wasn't sure whether this should be in the homework forums or not, but since I'm not asking for any solution of some sorts, i decided to post here. I'm a senior high school student...

Sorry for this weird thread. Say that you throw a perfectly round 10 lb stone rock using a machine with constant force and distance of propulsion. Can a 10 lb ("average") human head,with full hair about 2 inches long, be thrown -using the same machine - just as far as the 10 lb rock...

I am on the Formula SAE team at school where you design and build an open wheeled race car powered by a 600 cc motorcycle engine. We compete against other schools in different events including skid pad, autocross, endurance, etc. Last year we were a first year team and had a pretty basic simple...

Homework Statement What effects does the shape of a golf ball (dimples) have on its aerodynamics in comparison to a ball without dimples.

Good morning everybody, Glad to be back again after being banned for 7 days because I was judged by the moderator, asking the answer for the homework. Actually, HONESTLY, it was not a homework rather than a pure newbie question. I will ask again the SIMILAR question that causing me being...

For a High School level engineering course I was asked to create a very simple guide for solving lift and drag of an airfoil. We recently got a wind tunnel to test airfoils. Prior to this I didn't have any experience with lift and drag and would appreciate any input on the subject. I would...

Hello PF, I come to you from the airsofting community with a question that has plagued much of the community for years. I hope to get some feedback from the physics community to help direct or debunk some of the "theories" floating around this issue. So, airsoft is a sport where...

Hi everyone, I am new-by here. I am totally blind about cfd and aerodynamics. Can someone please help me how to model a simple air flow such as below link using gambit and fluent? Please don't assist to learn with below link...

Homework Statement The problem is to construct a model out of ordinary materials such as paper, blotting paper, foil, tights and so on, that is supposed to fall along about 3 metre long runner with as longest time as possible. (with the inspirations like maple seed)The Attempt at a Solution I...

Hi, I am currently completing undergraduate studies in electronics & aiming to pursue MS Aerospace from US. Can anybody please tell about good books for Aerodynamics & Flight which cover the basics for someone without a fluid dynamics background ? Thank you.

I'm currently doing the IB (equivalent to A levels) and we have to do a research on a subject and i took aerodynamics, specifically lift and can someone explain to me how the lift formula(F= Lift coeffecient x area x air density x velocity squared ) is found ? Thank you very much

Hi, How do you calculate the drag coeficient of a golf ball without the use of a wind tunnel. I have been researching this for hours and have not found a solution. The equation for the drag coefficient involves a value for drag which I cannot find out. I need to find the drag force to find the...

Homework Statement A hypersonic experimental aircraft is flying in the lower stratosphere at an altitude of 20 km, at a ground speed of 177m/s. a)the atmospheric pressure and temperature experienced by the aircraft at 20 km altitude, assuming an isothermal variation in temperature in the...

Heya Everybody! I was searching for papers on the Aerodynamic characteristics of diamond wings, I mean detailed research papers/ literatures/ E-books...as a part of my assignment cum Thesis. Unfortunately, I could'nt find many. If anyone of you could please guide me as to where I will be able to...

Homework Statement a) The weight of the aircraft = 4000 N b) Wing loading of the aircraft = 65N per sq m c) Find the minimum drag, maximum lift to drag ratio and the minimum drag speed at sea level Homework Equations...

Hi guys, Looking to designing a model air craft, but I want it to be able to carry X amount of mass of my choice. So to do this I need the basics on aerodynamics, air foils, lift and drag. If anyone could set me in the direction to some beginner material, as Aero is a new topic to me and...

Last semester, I learned that the dimples on golf balls and the fuzz on tennis balls make the balls go faster by inducing turbulent flow at a lower speed than it otherwise would. Turbulent flow reduces the drag on the object. When automobile engineers design cars, they seem to make them as...

Homework Statement attached Homework Equations attached The Attempt at a Solution attached hello, I have to do an investigation in Pysics, I chose aerodynamics of a paper plane... the thing is I am new to aerodynamics. basically I only want to know the areas of aerodynamics...

hello,:smile: I wanted to do some personal research in physics, which obviously is my subject of interest. more precisely something on aerodynamics. I am not sure yet on which part of aerodynamics i want to investigate in, but I had a few examples allready: aerodynamics applyed to a race car...

In my physics class, we are reviewing trajectory, so we are setting up a lab where we shoot some form of a paper rocket across our gym with an air compressor, and hopefully hit a target. The paper is kinda thick, but we can add whatever we want onto it, if we make it think it will make it will...

Homework Statement I am not sure if this is the right place to post this because this isn't a homework question, I more of a general question to help me think of ideas for an assignment. The first is how hyroelectricity uses physics, I can't really think of how their related. I know that it...

heyy guys, i am a mechanical engineer...i love aerodynamics...and i have completed reading introduction to the aerodynamics of flight-theodore.a.talay...i know all the basics somewhat...i am taking part in SAE Aero design competition next year...can you tell me what to read...

Hi Actually I am doing Mechanical engg. I want to study now aerodynamics. For the fundamentals of fluid mechanics I already have a book (okkishi, munson) but what book would you recommend for going advanced or deeper in lift, drag , downforce, stability. Actually I want to apply these concpets...

My friend had invented a new aerodynamic concept to reduce drag. My friends and colleagues say that his concept has striking similarity to B2 Stealth Bomber (elevation) design. I think his concept is novel and we contacted Northrop Grumman but there wasn’t any feedback. So I am inviting your...

I am in sort of a critical bind: I've been working for several months on an ISEF entry as part of a class (actually, working on the project IS the class), and in the past week it has completely fallen apart -- I won't go into details, but there is absolutely nowhere I can take the project...

Homework Statement Given: Inlet area = 23 ft², Inlet velocity = 107 ft/sec, Exit area = 12 ft². Find exit velocity The Attempt at a Solution I am having a hard time solving this. Can someone explain how to do this? Thanks

I am trying to write a basic flight simulator, i have "tried" to write many now without any real success. So if anyone is feeling kind and wants to have ago at talking me threw the equations in a more meaningful way than i kind find on the net, it would very much appriciated. I think...

So it's been known for awhile now that a blunt body passing through a plasma medium will experience reduced aerodynamic drag, and furthermore electrically active control surfaces can have an enhanced effect in plasma compared to conventional control surfaces, exerting greater control across the...

Homework Statement Testing golf ball aerodynamics.? how? i need a simple way to test the aerodynamic properties of spheres with different surfaces. i was thinking of doing it with liquid as in this video is there any other way i can do it or perhaps a way i can do it the way they...

I am working on research in the field of Aeronautical Engineering. My article deals with flow separation over dimpled surfaces. I am looking to submit my article to a journal, but I don't know how to decide who to send it to. At the moment, I am trying to decide between the following journals...

ok...i have a small question on aerodynamics for cars: in fluid mechanics, we studied the flow of air past an airfoil, which is designed to reduce drag (and obviously lift has a lot to do with it, but that is irrelevant for me now, so i am ignoring it). My question is that why aren't cars...

Why does a Frisbee delivered by a right handed thrower with a back hand release tend to roll to the left? or in general: Why does a flying disc tend to roll in the opposite direction that it is spinning? (see attached image)

The below though experiment which i devised, raises some personal concerns about my understanding of thermodynamics and aerodynamics, based on the fact that they seem to predict different outcomes. If anyone out there could offer some insight into what would actually happen, it would be greatly...

What would you say are the main focuses of research in aerospace engineering right now, specifically anything to do with aerodynamics or fluid mechanics in general. Is there a lot of research in new areas or is it mainly a lot of small tweaks in order to improve already existing systems? What do...

Sorry i didn't know where else to ask this so I'm hoping you guys can help anyways. If a air moving over a wing causes lift then why do planes need to move in order for this to happen. What i mean is instead of moving in order for the air to pass the wing why can't we "blow" air at fast speeds...

Homework Statement i have to write this physics paper on the aerodynamics behind the flying of a paper plane. what laws are being applied to make it fly? Homework Equations The Attempt at a Solution

I just found this site the other day and found people talking aerodynamcs. I start college this year to major in aerodynamic design and thought that you are the people I should talk to

can anyone enlighten me with key aerodynamic features which are used to heighten the performance of sportscars. thnx:approve:

I am looking for some help and advice on the title topics. Looking at ideas for a final year project, and currently looking at doing a high altitude and long endurance UAV. My definition of high altitude is 100k - 200k. I have looked at some other uavs that have done this, including the...

Homework Statement My physics teacher has set me this homework where I have to find out how large vehicles(lorries,trains,etc.) have been modified to be more aerodynamic. please could you just give me some links or pointers to help me finish this task. 2. The attempt at a solution...

Hello Could someone introduces me a source to learn aerodynamics? thanks