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Showing results 1 to 13 of 13 Search took 0.00 seconds. Search: Posts Made By: dijinj

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

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 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...

Forum: Main CFD Forum January 15, 2010, 01:05

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj best of luck for your project. "AVL fire" would... best of luck for your project. "AVL fire" would be the ultimate software for engine design. actually engine design involves lot of variable. not all variable should be at its best because of the...

Forum: Main CFD Forum January 14, 2010, 12:34

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj I got these information from book titled "a... I got these information from book titled "a course in internal combustion engines" by M L Mathur. ignition is adversely affected by turbulence in SI engines that's why spark plug is given in recess. ...

Forum: Main CFD Forum January 14, 2010, 09:50

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj You have very high theoretical knowledge and... You have very high theoretical knowledge and being on CFD-online ; I assume you are a CFD specialist with mechanical engineering background. Am I Correct.

Forum: Main CFD Forum January 14, 2010, 09:37

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj spark timing is advanced in SI engines to... spark timing is advanced in SI engines to compensate for ignition lag. A turbulant motion of mixture intensifies the process of heat transfer and mixing of burned and unburned portions in the flame...

Forum: Main CFD Forum January 14, 2010, 09:01

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj what i am saying spark angle is not advanced... what i am saying spark angle is not advanced because turbulence also increase at high speed and in turbulent flow flame propagation speed will be very high. so at higher rpm fuels burn at faster...

Forum: Main CFD Forum January 14, 2010, 06:04

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj Fuel burning crank angle will be almost same... Fuel burning crank angle will be almost same irrespective of rpm even in piston engines because of turbulence also increase at high speed and in turbulent flow flame propagation will be at very high...

Forum: Main CFD Forum January 13, 2010, 09:14

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj please see the pv diagram in the link... please see the pv diagram in the link http://sites.google.com/site/anyoonrotaryengine/pv-diagram. constant volume heat addition can provide more work than piston engines engine. in piston engines...

Forum: Main CFD Forum January 12, 2010, 22:49

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj even engine working between 2000k and 300k (room... even engine working between 2000k and 300k (room temp) will have Carnot limit of efficiency around 85%. the 2000k is achieved by implementing constant volume heat addition without any mechanical...

Forum: Main CFD Forum January 12, 2010, 09:31

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj engine working between 2000k and 270k can have... engine working between 2000k and 270k can have efficiency 86.5% according to Carnot limit. this 270k can be attained by higher expansion ratio and water injection

Forum: Main CFD Forum January 11, 2010, 21:23

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj theoretically an engine can have 100% efficiency... theoretically an engine can have 100% efficiency if exhaust temp is same as intake temp; i mean no heat is rejected all heat is converted to mechanical energy. normally a engines have around 30%...

Forum: Main CFD Forum January 11, 2010, 13:18

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj it achieves this efficiency by using... it achieves this efficiency by using thermodynamic cycle advantages and new cooling system. stoppers seal cycle chambers you can view or download animations from download page for reference. cam is...

Forum: Main CFD Forum January 11, 2010, 10:36

Replies: 24 Rotary engine with efficiency of 80%+ Views: 6,397 Posted By dijinj Rotary engine with efficiency of 80%+ I have invented a new rotary engine with more than 80% efficiency please help me to improve this concept and cfd modelling of the engine. Technical details are given in site...

Showing results 1 to 13 of 13

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