A pressure-exchange ejector transferring energy by compression and expansion waves has the potential for higher efficiency. The width and position of each port are essential in pressure-exchange ejector design. A dimensionless time τ expressing both port widths and the positions of port ends was introduced. A prototype was designed and the experimental system was set up. Many sets of experiment with different geometrical arrangements were conducted. The results suggest that the efficiency greatly changes with the geometrical arrangements. The efficiency is about 60% at proper port widths and positions, while at improper geometrical arrangements, the efficiency is much lower and the maximum deviation may reach about 20%. The proper dimensionless port widths and positions at different operating conditions are obtained. For a fixed overall pressure ratio, the widths of the high pressure flow inlet and middle pressure flow outlet increase as the outlet pressure increases and the low pressure flow inlet width is reduced with a larger outlet pressure. The middle pressure flow outlet (MO) opening end remains constant at different outlet pressures. The positions of the high pressure flow inlet (HI) closed end and the low pressure flow inlet (LI) open end increase with the elevation of outlet pressure, however, the distance between the HI closing end and the LI opening end is constant. The port widths and positions have a significant influence on the performance of the pressure-exchange ejector. The dimensionless data obtained are very valuable for pressure-exchange ejector design and performance optimization.

References

1.
Bulusu
,
K. V.
,
Gould
,
D. M.
,
Garris
,
C. A.
Jr.
, 2008, “
Evaluation of Efficiency in Compressible Flow Ejectors
,” IMECE Paper No. 2008-67622.
2.
Azoury
,
P. H.
, and 1992,
Engineering Application of Unsteady Fluid Flow
,
Wiley
,
New York
.
3.
Zhang
,
H. F.
, and
Garris
,
C. A.
, Jr.
, 2004, “
A Comparative Study of Flow Induction by Pressure Exchanger
,” AIAA Paper No. 2004-2343.
4.
Kentfield
,
J. A. C.
, 1998, “
Wave Rotors and Highlights of Their Development
,” AIAA Paper No. 1998-3248.
5.
Akbari
,
P.
,
Nalim
,
R.
, and
Müller
,
N.
, 2006, “
A Review of Wave Rotor Technology and its Applications
,”
ASME J. Eng. Gas Turbines Power
,
128
, pp.
717
735
.
6.
Spalding
,
D. B.
, 1958, British Patent No. 799143.
7.
Jendrassik
,
G.
, 1958, German Patent No. 1 030 506.
8.
Spalding
,
D. B.
, 1958, “
A Note on Pressure Equalizers and Dividers
,” Power Jets (Research and Development) Ltd.. Report. No. 2251/Px 3.
9.
Azoury
,
P. H.
, 1965, “
An Introduction to the Dynamic Pressure Exchanger
,”
Proc. Inst. Mech. Eng.
,
180
, pp.
1847
1996
.
10.
Kentfield
,
J. A. C.
, 1969, “
The Performance of Pressure-Exchanger Dividers and Equalizers
,”
ASME J. Basic Eng.
,
91
(
9
), pp.
361
370
.
11.
Akbari
,
P.
and
Szpynda
,
E.
, “
Recent Developments in Wave Rotor Combustion Technology and Future Perspectives: A Progress Review
,” AIAA Paper No. 2007-5055.
12.
Welch
,
G. E.
, 1997, “
Two-Dimensional Computational Model for Wave Rotor Flow Dynamics
,”
ASME J. Eng. Gas Turbines Power
,
119
, pp.
978
985
.
13.
Nalim
,
M. R.
,
Li
,
H.
, and
Akbari
,
P.
, 2009, “
Air-Standard Aerothermodynamic Analysis of Gas Turbine Engines With Wave Rotor Combustion
,”
ASME J. Eng. Gas Turbines Power
,
131
, pp.
1
6
.
14.
Paxson
,
D. E.
, and
Wilson
,
J.
, 1992, “
A Improved Numerical Model for Wave Rotor Design and Analysis
,” Paper No. NASA-TM-105915, E-7398, NAS 1.15:105915 (also AIAA Paper No. 93-0482).
15.
Paxson
,
D. E.
, and
Wilson
,
J.
, 1995, “
Recent Improvements to and Validation of the One Dimensional NASA Wave Rotor Model
,” Paper No. NASA-TM-106913, E-9621, NAS 1.15, p. 106913
16.
Yang
,
D. W.
,
Lin
,
R. Y.
,
Wang
,
M. K.
, and
Ai
,
L.B.
, 2005, “
Low-Pressure Natural Gas Transmission by Steady Flow Ejector
,”
Oil-Gasfield Surf. Eng.
,
24
(
4
), pp.
10
12
.
You do not currently have access to this content.