Anthony
Worth your time to dissemble that pump and let us have a good look at
the housings and turbine? Or just take that turbine off and send it to
me to examine? lol
Again being funny but kinda serious at the same time.
That would be a great pump to examine about right now.
-------- Original Message --------
Subject: [AR] Re: Arocket Pump Progress
From: "Anthony Cesaroni" <acesaroni@xxxxxxxxxxx>
Date: Mon, July 13, 2015 2:54 pm
To: <arocket@xxxxxxxxxxxxx>
The SA-2 sustainer has the axial turbine in the middle with the hypergolic
propellant pumps on each end. One of the last unfired version sits in my
board room at the SRQ facility. ~200 shp. Pc is around 900 psi IIRC. A very
famous LR-101 known as “7-UP” is on the right.
Best.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Alexander Ponomarenko
Sent: Monday, July 13, 2015 5:04 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Arocket Pump Progress
In case of closed impeller design, the distance between impeller and housing
should be rather large to minimize the friction losses. The hydraulic losses
as well as axial thrust are typically controlled by diameter of and clearance
between wearing or floating rings on both sides of the impeller.
In case of open design, the mentioned is applicable to the back
("closed") side of the impeller only, whereas the clearance between open
blades and pump housing should be as small as possible. This makes crucial
both the assembly precision and the balancing of the axial thrust.
The usage of double-suction impellers may indeed compensate the axial thrust,
but such design is impractical in case of small pumps because of too small
height of blades. Better to design the bi-prop single-shaft turbopump with
such location of the impellers that their axial thrusts compensate each other
- at least partially. Of course, this is applicable for bi-prop only.
Regards,
Alexander
On 07/12/2015 02:43 PM, Monroe L. King Jr. wrote:
I'd like to propose a question about the distance of the backside of
the impeller from the housing.
Is there an ideal distance on the backside of the impeller and should
that surface be smooth or ribbed?
Peter H. would you be interested in running CFD on this impeller
design? Also looking for FEA analysis if anyone's interested.
