Vortex rocket engine: lighter, more efficient, more reusable

Point out news stories, on the net or in mainstream media, related to polywell fusion.

Moderators: tonybarry, MSimon


choff
Posts: 2432
Joined: Thu Nov 08, 2007 5:02 am
Location: Vancouver, Canada

Postby choff » Fri Dec 21, 2012 9:20 am

Cool!
CHoff

bennmann
Posts: 227
Joined: Sun May 17, 2009 5:56 pm
Location: Southeast US

Postby bennmann » Fri Dec 21, 2012 3:07 pm

Choff did you mean to ruin the article like that? Spoilers!

CaptainBeowulf
Posts: 498
Joined: Sat Nov 07, 2009 12:35 am

Postby CaptainBeowulf » Fri Dec 21, 2012 6:55 pm

Anyone have a decent idea how the Vortex compares to SpaceX's Merlin engines? I did a couple of searches but couldn't find any real discussion. It might be because the various sources currently seem a bit vague on the exact specs of the Vortex.

zapkitty
Posts: 267
Joined: Fri Apr 09, 2010 8:13 pm

Postby zapkitty » Fri Dec 21, 2012 7:25 pm

CaptainBeowulf wrote:Anyone have a decent idea how the Vortex compares to SpaceX's Merlin engines? I did a couple of searches but couldn't find any real discussion. It might be because the various sources currently seem a bit vague on the exact specs of the Vortex.


... specs for what in particular? The engine that flew in Mojave was an R&D article and not a prototype for production.

The flight was good news for the concept but it's a bit early to be trying to fit the tech to a Falcon XXX :)

ScottL
Posts: 1122
Joined: Thu Jun 02, 2011 11:26 pm

Postby ScottL » Fri Dec 21, 2012 7:34 pm

I don't view this as something that can be compared as much as a novel idea that eliminates the need for a cooling system. I'm pretty sure most rocket engines could implement this change (providing it all pans out) with little hassle.

zapkitty
Posts: 267
Joined: Fri Apr 09, 2010 8:13 pm

Postby zapkitty » Fri Dec 21, 2012 8:50 pm

ScottL wrote:... I'm pretty sure most rocket engines could implement this change (providing it all pans out) with little hassle.


?

Did you mean something like "most classes of rocket engines"?

Given the rather integrated nature of regenerative cooling systems for large engines and the specialized combustion chamber geometry required for the vortex I don't think actual reuse of currently used engine designs is in the cards.

Something in the Merlin class but either lighter or more powerful for the same mass...

hanelyp
Posts: 2255
Joined: Fri Oct 26, 2007 8:50 pm

Postby hanelyp » Fri Dec 21, 2012 11:37 pm

This style of injection and cooling would require a combustion chamber of particular geometry. In addition, it wouldn't work with certain engine cycles, such as the expander cycle, where heating the propellant in cooling passages is part of operation. But reliable, efficient engines at low cost is a good thing.

choff
Posts: 2432
Joined: Thu Nov 08, 2007 5:02 am
Location: Vancouver, Canada

Postby choff » Sat Dec 22, 2012 12:58 am

bennmann wrote:Choff did you mean to ruin the article like that? Spoilers!


Cool, as in it replaces the conventional cooling system(pun intented).
CHoff

DeltaV
Posts: 2245
Joined: Mon Oct 12, 2009 5:05 am

Postby DeltaV » Mon Dec 24, 2012 4:36 pm

Maybe Orbitec's reversed-axial-flow vortex can be combined with a Polywell to heat air, air + onboard propellant or onboard propellant by whatever means (relativistic electron beam, alpha particles, arc discharge, ...) without thermally overloading the thrust chamber walls, which would have to contain between 0.5 to 5+ GW of power transfer to the flow stream.

http://www.talk-polywell.org/bb/viewtop ... cdf0cc7a30

paperburn1
Posts: 2454
Joined: Fri Jun 19, 2009 5:53 am
Location: Third rock from the sun.

Postby paperburn1 » Tue Dec 25, 2012 4:17 pm

I remember reading about a burner that used vortex technology and they were planing to use it on water heaters or some such thing as it transferred no heat to the burner leaving more to be transferred to the water. I wonder if this is based on the same concept or something different?]

DeltaV
Posts: 2245
Joined: Mon Oct 12, 2009 5:05 am

Postby DeltaV » Tue Dec 25, 2012 5:57 pm

Maybe you are thinking of the work of Gutsol and others at Drexel (several types of vortex chambers were studied - no-arc, arc, inductively-coupled plasma):

http://www.pages.drexel.edu/~rpg32/diesel.htm
(looks like an unmaintained web page, copy it while you can)

Gliding arc in tornado using a reverse vortex flow

Comparative Calorimetric Study of ICP Generator with Forward-Vortex and Reverse-Vortex Stabilization

Image

Image


The Gliding Arc Tornado at lower right has two very desirable features for a possible Polywell-driven propulsor -
1) Very little heat transfer to cylinder wall.
2) Less wear on the lower ring and upper annulus electrodes with the gliding arc (distinct arcs are blurred in photos due to exposure time).

Getting a high-enough flow rate may be the idea killer. A few large chambers or multiple smaller ones? Mix in axial flow through the ring electrode and/or around the chamber? Fire a REB along the axis? Lot's of things to try.

Carl White
Posts: 317
Joined: Mon Aug 24, 2009 10:44 pm

Re: Vortex rocket engine: lighter, more efficient, more reusable

Postby Carl White » Tue Jul 30, 2019 3:41 am

https://www.space.com/sierra-nevada-vor ... video.html

SNC's upper-stage Vortex engine will be used on board the Dream Chaser spacecraft, which is expected to launch from a ULA Atlas V rocket and run cargo missions to the International Space Station as early as 2021.

Giorgio
Posts: 2719
Joined: Wed Oct 07, 2009 6:15 pm
Location: China, Italy

Re: Vortex rocket engine: lighter, more efficient, more reusable

Postby Giorgio » Tue Jul 30, 2019 7:26 am

Too late for them to carve a niche in the market I believe.
Their ingenious idea advantages are being eroded more and more by alloys developments and the new rocket engines generations.
A society of dogmas is a dead society.

Maui
Posts: 577
Joined: Wed Apr 09, 2008 12:10 am
Location: Madison, WI

Re: Vortex rocket engine: lighter, more efficient, more reusable

Postby Maui » Tue Jul 30, 2019 10:54 pm

CaptainBeowulf wrote:Anyone have a decent idea how the Vortex compares to SpaceX's Merlin engines? I did a couple of searches but couldn't find any real discussion. It might be because the various sources currently seem a bit vague on the exact specs of the Vortex.

One of the major benefits SpaceX is looking for in the new Raptor engine they are developing for BFR/Starship is the lower turbine temperatures of the full flow cycle it uses. Reliability of the engine over many uses is a major concern to SpaceX and apparently the ability of the turbines to hold up under the temperatures in gas generator engines like the Merlin were a potential limiting factor to engine lifespan.

I guess I would be curious to know comparatively how much of a problem heat is in the turbines vs the combustion chamber.


Return to “News”

Who is online

Users browsing this forum: No registered users and 14 guests