Search found 7 matches

by kenshin
Mon Jan 09, 2017 12:28 pm
Forum: Pressure jet forum
Topic: see running new type of pressure jet - methanol fuel
Replies: 34
Views: 40064

Re: old images from 90's

hi all, see our trials from early 90's The 25N engine seems to have benefited from small inlet area / good matching with injector. But why you choose large combustor diameter and length, for gas dynamic purpose, stable combustion, or more surface of heat exchange? Older engines have problem of comb...
by kenshin
Mon Jan 09, 2017 12:23 pm
Forum: Pressure jet forum
Topic: see running new type of pressure jet - methanol fuel
Replies: 34
Views: 40064

Re: see running new type of pressure jet - methanol fuel

Hi Viv thanks for these patents ! on the first look it seems similar to my engine. but we need no oxygen, and we have only one-stage-injector for example. I will study this very thoroughly. I attach the old simulation code (pascal as ascii text file) to this post. unfortunately comments are in germ...
by kenshin
Sun Jan 03, 2010 1:59 pm
Forum: Valveless pulsejet forum
Topic: Please put your "I am new and need help" question here.
Replies: 404
Views: 1940265

Re: Please put your "I am new and need help" question here.

already tried, rich fuel flame out
now looking for suitable air source to start a "Chinese CS" type liquid fuel system
maybe a bike tire hand pump.
metiz wrote:you could try flipping the bottle upside down to give it liquid but I don't think it'll work
by kenshin
Sun Jan 03, 2010 6:46 am
Forum: Valveless pulsejet forum
Topic: Please put your "I am new and need help" question here.
Replies: 404
Views: 1940265

Re: Start a valveless pulsejet with electric ducted fan?

Could electric ducted fan replace leaf blower to start a valveless pulsejet (mini thermojet)? I don't have propane tank or leaf blower. Use butane lighter refill bottle + rosscojector, the engine failed to start Well, a leaf blower is in fact also a ducted fan... I think the problem is in the light...
by kenshin
Sat Jan 02, 2010 2:52 pm
Forum: Valveless pulsejet forum
Topic: Start a valveless pulsejet with electric ducted fan?
Replies: 1
Views: 2616

Start a valveless pulsejet with electric ducted fan?

Could electric ducted fan replace leaf blower to start a valveless pulsejet (mini thermojet)?
I don't have propane tank or leaf blower.
Use butane lighter refill bottle + rosscojector, the engine failed to start
by kenshin
Fri Jan 01, 2010 7:51 am
Forum: Valved pulsejet forum
Topic: The Cybernetics of a Pulse Combustor
Replies: 28
Views: 2830771

Re: The Cybernetics of a Pulse Combustor

Some professional research http://www.ncbi.nlm.nih.gov/pubmed/12779686 Maintenance of chaos in a computational model of a thermal pulse combustor Chaos. 1997 Dec;7(4):605-613. Maintenance of chaos in a computational model of a thermal pulse combustor. In V, Spano ML, Neff JD, Ditto WL, Daw CS, Edwar...
by kenshin
Fri Jan 01, 2010 7:41 am
Forum: Valved pulsejet forum
Topic: Several questions about design
Replies: 11
Views: 10784

Re: Several questions about design

a question on TSFC calculation The following reserch paper stated the exit gas velocity of a dynajet-type pulse combustor varies from 40m/s to 130m/s in a cycle, and the average value is smaller than 100m/s. velocity.JPG http://serve.me.nus.edu.sg/arun/file/teaching/ME6024/Basics%20of%20Pulse%20Comb...