[AR] Famous LR-101 (was: Arocket Pump Progress)

From: Randall Clague <rclague@xxxxxxxxx>
To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
Date: Mon, 13 Jul 2015 15:15:11 -0700

I'll bite. How does an individual vernier engine become famous?

-R

On Mon, Jul 13, 2015 at 2:54 PM, Anthony Cesaroni <acesaroni@xxxxxxxxxxx>
wrote:

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.

Follow-Ups:
- [AR] Re: Famous LR-101 (was: Arocket Pump Progress)
  - From: Anthony Cesaroni

[AR] Famous LR-101 (was: Arocket Pump Progress)

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