Get. 10, 1950
J. 5. CLARKE
2,525,206 '
MULTIPLB-"I'RUNCATEUCWICAL ELEMENT comaus'rzon CHAMBER
Filed Feb. . 8, 1946
\irlyuw
Patented Oct. 10,)?y1950
2,525,206
UNITED :STATES PATENT OFFICE
2,525,206
‘
' .MULTI'PLE TRUNCATED CONICAL ELEMENT
“ '
"
" "
COMBUSTIQN CHAMBER
John Stanley Clarke, Birmingham, ‘England-as;
signor to Joseph Lucas Limited, Birmingham,
England
Application February 8, 1946, Serial No. 646,395
In Great Britain December 13, 1944
Section 1, Public Law 690, August 8, 1946
Patent expires December 13, 1964
1 Claim.
'
(CI. 60-44)
1
This invention relates to internal combustion
prime movers, of the kind adapted to utilise
the energy of a continuous stream of hot gases.
2
Around the'combustion and mixing chambers
a, f is arranged a sheet metal casing g which
forms an annular air jacket 'h around the said
chambers. The jacket h receives air from the
same source as the combustion chamber a, the
The object of the invention is to provide im
proved means for generating the hot gas stream.
The invention comprises the combination of a
diluent air being directed into the jacket by an
combustion chamber, a coaxial mixing chamber
annular de?ector 2' adjacent to the closed end
for mixing the products of combustion with dil
of the combustion chamber. The end of the
uent air, and a jacket which surrounds the said
jacket h adjacent to the discharge end of the
chambers and is closed (or substantially closed) 10 mixing chamber f is closed or substantially closed
at the end remote from its inlet end, the mixing
by a ring I which slidably supports the adjacent
chamber consisting of a series of annular com
end of the mixing chamber 1‘ and which may be
ponents of truncated conical form which are con
formed with longitudinal grooves a’ through which
nected to each other and to the combustion cham
air ?ow can occur to effect a cooling action in the
ber by junctions formed with perforations, for 15 region of the said end. The ring I also forms
the admission of diluent air from the jacket.
part of an expansion joint between the adjacent
The accompanying drawing is a sectional side
ends of the casing g and an outlet connection
view of means constructed in accordance with
7c communicating with the discharge end of the
the invention.
'
I
mixing chamber f.
In carrying the invention into effect as shown, 20 When the apparatus is in operation, primary
I employ a sheet metal combustion chamber a
combustion of the fuel occurs in the region of
of substantially cylindrical form and provided
the closed end of the combustion chamber a. and
With a perforated domed end cover I). The latter
the combustion is completed by the admission
carries an axially arranged liquid fuel nozzle 0
of secondary air from the jacket it through per
surrounded by stationary guide vanes d past 25 forations m adjacent to the said region. On
which air from any convenient source can enter
issuing from the combustion chamber a the prod
the combustion chamber a, the guide vanes being
ucts of combustion meet a stream of diluent air
adapted to impart a uniform rotary motion to the
entering from the jacket h through the perfora
air. The perforations b1 in the end cover I) also
tions is between the combustion chamber and the
enable air from the said source to enter the com 30 ?rst element f1 of the mixing chamber 1‘, and at
bustion chamber a. Moreover, there may be pro
the junction of this element with the second ele
vided in the interior of the end cover I) a perfo
ment of the mixing chamber a further admission
rated ba?le e adapted to ensure proper distribu
of diluent air from the jacket is effected through
tion of the air entering the end cover around
the other perforations f3 the process being re
35 peated when more than two mixing chamber ele
the ?uid jets issuing from the nozzle 0.
The open end of the combustion chamber a ter
ments are used. Finally the mixture of hot
minates in a coaxial mixing chamber f in which
gases emerges from the mixing chamber 1‘ and is
the products of combustion are mixed with dil
thence conveyed from the outlet connection It by
uent air. The mixing chamber f consists of a
a pipe to a turbine or elsewhere where it is re
series of two or more annular sheet metal ele 40 quired to utilise the energy of the stream.
ments f1 of truncated conical form. The larger
By this invention I am able to effect the mix
end of the ?rst element f1 is adjacent to the exit
ing of diluent air with the products of combus
end of the combustion chamber a (which latter
tion in a manner which involves a minimum of
may terminate as shown in a short portion of
energy loss. The invention is not, however,
45
truncated conical form), and the smaller end
limited to the example above described as con-‘
of the ?rst element is adjacent to the larger end
structional details may be varied to suit different
of the second element. When only two elements
I1 are used, the second ismade considerably longer
than the ?rst. The elements 11 are connected
requirements.
'
Having thus described my invention what I .
claim as new and desire to secure by Letters Pat
to each other and to the combustion chamber a 50 ent is:
by annular junction pieces f2 the latter being
For use with an internal combustion prime
formed with perforations f3 for the admission
mover of the kind speci?ed, means for generat
of diluent air. Alternatively each junction piece
may be formed integrally with one end of one of
the parts to be connected.
ing the hot gas stream, comprising the combina
tion with a combustion chamber, a coaxial mix
ing chamber composed of a series of annular com
2,525,206
3
4
ponents of truncated conical form for mixing
REFERENCES CITED
the products of combustion with diluent air, and
-
a jacket which surrounds the said chambers and
is at least substantially closed at the end remote
?lghgf fgligwggtgerfgerences are of record in the
UNITED 'STATES PATENTS
which directly connect the annular components
of the mixing chamber to each other and to the
combustion chamber, and which are formed with
perforations for the admission of diluent air from
Number
2,107,365
2,268,464
2,393,654
from its inlet end, of annular junction pieces 5
the jacket.
10
JOHN STANLEY CLARKE.
Name
- Date
Bray ____________ __ Feb. 8, 1938
Seippel __________ __ Dec. 30, 1941
Lubbock ________ __ Apr, 16, 1946