Recent content by alchemist

Well, the deviation is roughly 1.2~1.5%, i am not sure how significant is this deviation, based on literature review, it should lie around 0.5%. i am just trying to measure the wake profile of an simple airfoil model.

well, i understand where you guys are coming from, but the thing is that due to the nature of the measuring equipment set up, the data points on the velocity profile do not form a perfectly smooth profile, caused by random fluctuation (wind tunnel speeds, pitot tube calibration uncertainty)...

Hi guys, I have been trying to measure the drag characteristics of a wind tunnel model by using a pitot-static tube set up. From which the transducer will output to me the stream-wise velocity profile based on the pressure differential measured. Following which, in order to evaluate the...

Hi, i would just like to clarify some terms used in aerodynamics with you guys here and find out more about these terms at the same time. Turbulent shear layer: Does this term refer to the first layer of air immediately adjacent to the wall surface over which the air flows? Turbulent...

"velocity fluctuations necessarily mean pressure fluctuations " thank you boneh3ad, this is the missing link i have been searching for =) My next question would be the role of frequency in the generation of aerodynamic sounds. Or rather, what affects the frequency, hence wavelength of the...

Hi guys, its been awhile since i have been back. Right now, i am involved in some research on aeroacoustics and i have been trying to get some of the basic fundamentals on aerodynamic generation of sounds. Unfortunately most of the online literature do not give much details on the physics of...

Thank you Cyrus! Here's more questions from me, 1. you mentioned that "They are what is known as 'distorted' in Reynolds number. The underlying assumption is that the plot of drag coefficient vs Reynolds number on a log scale is more or less flat. This isn't true, and makes scaling...

Guys, i need some help on wind tunnels here. Basically i need to find out more on the operation principles behind wind tunnels. Basically, wind tunnels provide simulation environment of high speed (transonic) flows by mimicking the reynolds number on the actual flow, because of dynamic...

Thanks dude, I've figured out the answer to this question. i just didnt know how to continue with the question after finding out the first shock angle and the mach number of the flow after that. "rinse and repeat" help me sorted it out. lol cheers!

Hi guys, i need some help on this topic. Basically, i need to calculate the angle of reflection of a oblique shock on a solid boundary. Here is the description of the question i have: an incident supersonic flow reaches a compression corner, with a deflection angle of 15 degrees...

Thank you lecturer! lol, is this considered cheating if i ask such a question over here? well, yea, i am studying in university of manchester now, do you happen to be my Dynamics lecturer?? Now this is pretty amazing =))

Homework Statement I am asked to provide an anti vibrational support mount for equipment mounted on turbo-prop aircraft. The equipment has a mass of 40kg. the vibrational response of the equipment to the environmental disturbances will need ot satisfy a safety limit prescribed by the...

i am having the same problems! never knew there was any issue with partial fractions involving exponential components. my question was to get partial fraction from 3e^-2s/(s(s+5)), so i brought down the exponential function to get 3 different fractions with 1/e^2s, 1/s and 1/(s+5). But it...

i am doing a study on the flight dynamics of a sailplane. How does the downward motion of the glider gives rise to lift and the forward thrust. the free http: //www.yorksoaring.com/whatissoaring/wis3.html So the question that has been bothering me is that whether the direction of drag is...

I see, so you are saying that the value that i read off from the cheaper voltmeter would be the value of the RMS already? or do i still need to multiply the reading i get by 1/sqrt2? Thanks!