The document summarizes the advantages of a pistonless pump over traditional turbo pumps for use in rocket engines. It describes how a pistonless pump works using two alternating pumping chambers to provide steady fluid flow and pressure with minimal moving parts. This makes the pump lighter, simpler, more reliable, and efficient compared to turbo pumps. However, it is limited to the drive pressure and cannot be used for higher pressure combustion cycles. Overall, the pistonless pump offers potential benefits for applications requiring a reliable and low-cost fuel pump solution like deep space missions and low-cost rocket systems.

1. D.SRIMANNARAYANA
MECHANICAL ENGINEERING
17281A0324

3. • Pump is a device which converts mechanical energy into hydraulic
energy.
• Principle: A partial vacuum created when internal parts of
pump receives mechanical energy .
• Oil is forced into pump due to atmospheric pressure on oil and
suction created by pumping element.
• Oil is squeezed b/w pump elements which increases pressure of fluid
and then is forced out of pump and the cycle continues.

4. • Turbo pumps have a reputation
for being extremely hard to
design to get optimum
performance
• Low efficiency – ONLY 55%
• Weight of pump is high hence
Undesirable to use.

5. • The turbo pumps used in rocket are very heavy, containing many rotating
parts by which there are more frictional losses which more consumption of
fuel there by decreasing the efficiency of the engine .
• since the rocket has to remain stable in the space, is difficult and require
complex methods for it. If this pump gets any fault then its reappearance
requires long time. So, there must be such a device which overcomes all the
drawbacks of the turbo pump.
• The Piston less pump is the solution for the problems faced by using turbo
pumps.

6.  NASA has designed, built and tested
a simple, light weight pump (dual
piston less pump) for use in liquid
propelled rocket where a reliable
pump with minimal moving parts is
needed.
 This pump has the potential to
reduce the cost and increase the
reliability of rocket fuel pumps by a
factor of 20 to 100.

7. It consists of main tank and Two pumping
chambers . The pump starts with both
chambers filled.
Each one being alternately refilled and
pressurized .
One chamber is pressurized, and fluid is
delivered to the rocket engine from that
chamber(Step 1).

8.  Once the level gets low in one
chamber, the other chamber is
pressurized;

9.  Flow is thereby established from
both
period
sides
until
during a short
full flow is
established
chamber.
from
Then
the other
the nearly
empty chamber is vented and
refilled.

10.  Finally the cycle
repeats. This results in
steady flow and
pressure. The pump is
powered by
pressurized gas which
acts directly on the
fluid

11. • DEEP SPACE PROPULSION - NASA has a need for high Power
propulsion to land and spacecraft on the moons of Jupiter and
beyond. This pump would allow these missions to go forward due to
lower weight of the fuel tanks.
• X PRIZE VEHICLE FUEL PUMP APPLICATION- For X-prize competitors, a
the fuel pump will reduce the cost.

12. • All the hardware in the pump consists of pressure vessel so the weight is
low.
• The pump can be scaled up or down with similar performance and
minimal redesign issues.
• Low risk development; pump technology has been demonstrated and
prototypes have been built and tested.
• The manufacturing tolerances need not be tight.
• Less moving parts , hence lubrication required is quite low.
• Design is simple compared to turbo pumps.

13. • They cannot pump to higher then drive pressure(area ratio is 1:1).
• They cannot use either a staged combustion or expander cycle.
• A gas generator cycle is also difficult to integrate with the piston less
pump.
• The generated gas must be chemically compatible with both the
propellants.
• This gas generator lowers the ignition start period of the engine.

14. • Static test and fly pump
in student rocket with
Flometric’s rocket
technology.
• Along with latest low
cost engine designs,
pump will make lunch
systems more safe,
reliable and affordable

15. • The most significance of property of Piston less pump that makes
them different from that of turbo pump ,is the absence of piston.
• This is the most unique technique. In this ,no. of rotating parts is very
less as compared to that of turbo pump. Also, it’s installation is very
easy. and moreover, it is light weight than turbo pump. So, it has less
losses and improves, rather increases efficiency of engine. Also, it is
much economical than turbo pump.