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Showing results 1 to 25 of 37 Search took 0.00 seconds. Search: Posts Made By: dijinj

Forum: Main CFD Forum January 19, 2011, 22:23

Replies: 4 Highest LD ratio designs Views: 4,291 Posted By dijinj Thanks Thank you very much Thanks Thank you very much

Forum: Main CFD Forum January 19, 2011, 21:23

Replies: 4 Highest LD ratio designs Views: 4,291 Posted By dijinj I am looking for wing profile only not complete... I am looking for wing profile only not complete aircraft. I only need 2d cross section of airfoils

Forum: Main CFD Forum January 17, 2011, 09:43

Replies: 4 Highest LD ratio designs Views: 4,291 Posted By dijinj Highest LD ratio designs can someone give the technical name or coordinate files of airfoils having highest LD ratio; above 50 also tell me how to generate a sears hack body's coordinate file

Forum: Main CFD Forum February 21, 2010, 21:57

Replies: 2 Zero Pressure Drag Design Views: 1,361 Posted By dijinj That was funny! Is there any technical... That was funny! Is there any technical reasons? Please be serious. I took lot of effort to make this concept

Forum: Main CFD Forum February 21, 2010, 12:47

Replies: 2 Zero Pressure Drag Design Views: 1,361 Posted By dijinj Zero Pressure Drag Design I had invented a new aerodynamic concept to reduce drag. The CFD analysis shows Horizontal velocity vectors at Trailing edge. I think this implies zero pressure drag, since all the kinetic energy...

Forum: Main CFD Forum February 7, 2010, 03:36

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj Actually both Tangents at trailing edge is... Actually both Tangents at trailing edge is horizontal but cusp is more general term cycloid is only a member of that group. can you suggest a link of the article "A boundary integral equations...

Forum: Main CFD Forum February 6, 2010, 19:49

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj What is your Idea on how lift is generated in... What is your Idea on how lift is generated in airfoils :)

Forum: Main CFD Forum February 6, 2010, 19:29

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj Indeed lift is generated but pressure difference... Indeed lift is generated but pressure difference is at front end; check pressure contours of cycloid wing. helicopter rotor and propellers are designed in such a way that it pull air downward or back...

Forum: Main CFD Forum February 6, 2010, 13:03

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj CUSAT = cochin university of science and... CUSAT = cochin university of science and technology

Forum: Main CFD Forum February 6, 2010, 09:27

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj thanks I will read through VKI lecture series on... thanks I will read through VKI lecture series on aerodynamic shape optimization. I think that will be very helpful in developing my concept I would be highly obliged if you could comment on the...

Forum: Main CFD Forum February 6, 2010, 08:00

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj I know Air foil design has 100 years of research... I know Air foil design has 100 years of research database. Nowadays no one uses a particular theory, but uses a combination of these and optimizes using CFD for best result in a particular...

Forum: Main CFD Forum February 6, 2010, 07:25

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj Thanks; I studied Liebeck airfoils documents from... Thanks; I studied Liebeck airfoils documents from aiaa.org. But none of them mentioned horizontal velocity vectors or parallel velocity vectors (top and bottom) at trailing edge. or the squeezing...

Forum: Main CFD Forum February 6, 2010, 03:19

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj The lift in airfoil is generated by pressure... The lift in airfoil is generated by pressure difference; the lower pressure in upper side of wing is due to higher velocity of air. I am only tryin to make vertical component of velocity zero at...

Forum: Main CFD Forum February 6, 2010, 01:15

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj even if front is blunt the rest of the body... even if front is blunt the rest of the body profile is cycloid or combination of cycloid. But I never heard cycloid is used as thickness function of any airfoil. Also worth mentioning is that you...

Forum: Main CFD Forum February 5, 2010, 23:13

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj But still i am worried about the novelty of... But still i am worried about the novelty of concept. Is it possible that B2 stealth might be derived from similar concept; please comment on this

Forum: Main CFD Forum February 5, 2010, 22:50

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj Leading edge can be made blunt for varying angle... Leading edge can be made blunt for varying angle of attack. I have assumed the Kutta condition from pressure contour plot of post CFD.

Forum: Main CFD Forum February 5, 2010, 22:47

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj I am working on a paper in association with CUSAT... I am working on a paper in association with CUSAT professors. I have applied for a patent and it is in process. I am contacting companies for the help in manufacturing I would highly obliged if you...

Forum: Main CFD Forum February 5, 2010, 14:28

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj I tested with 5 degree and 0 degree. But I didn't... I tested with 5 degree and 0 degree. But I didn't did a 100% matching to reality CFD analysis because of the lack of computing resources; basically I did a 2d analysis

Forum: Main CFD Forum February 5, 2010, 13:32

Replies: 25 Secret Aerodynamics of B2 Stealth Views: 7,368 Posted By dijinj Secret Aerodynamics of B2 Stealth I had invented a new aerodynamic concept to reduce drag. My friends and colleagues say that my concept has striking similarity to B2 Stealth Bomber (elevation) design. I think my concept is novel and...

Forum: Main CFD Forum February 1, 2010, 09:23

Replies: 6 Highly aerodynamic design Views: 1,772 Posted By dijinj i used K-epsilon model and for comparison ... i used K-epsilon model and for comparison NACA 4412 airfoil is used. The freestream velocity is 50 m/s Pressure = 101,325 Pa Density = 1.2250 kg/m3 Temperature = 288.16 K Kinematic...

Forum: Main CFD Forum February 1, 2010, 08:39

Replies: 6 Highly aerodynamic design Views: 1,772 Posted By dijinj there are different turbulent models to choose... there are different turbulent models to choose from in CFD software like Fluent. so I can choose one from them

Forum: Main CFD Forum February 1, 2010, 02:31

Replies: 6 Highly aerodynamic design Views: 1,772 Posted By dijinj the animations are done in Maya fluid there is a... the animations are done in Maya fluid there is a pre-built wind tunnel in Maya and I placed a cycloid and airfoil with same aspect ratio(length: width). in airfoil at trailing edge crossing of...

Forum: Main CFD Forum January 31, 2010, 22:17

Replies: 6 Highly aerodynamic design Views: 1,772 Posted By dijinj Highly aerodynamic design I have invented a new aerodynamic shape with low drag. I am looking for your esteemed feedback on the concept. Technical details are given in site...

Forum: Main CFD Forum January 17, 2010, 02:35

Replies: 0 Exhaust less Nuclear Space Propulsion Views: 1,505 Posted By dijinj Exhaust less Nuclear Space Propulsion I have invented a new space propulsion device can you help me in improving or implementing the concept. The details are given in site : http://sites.google.com/site/exhaustlessnuclearpropulsion/

Forum: Main CFD Forum January 15, 2010, 08:28

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,406 Posted By dijinj built in modeler of AVL fire may have limited... built in modeler of AVL fire may have limited features as in other CFD programs. but it supports step or iges files. Unlike CFX, AVL Fire is specifically designed by AVL for IC engines, major...

Showing results 1 to 25 of 37

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