Diffuser with uniform air inlet and runoff combustion chamber

Abstract

The diffuser comprises a diffuser outer ring and a diffuser inner ring, the two ends of a plurality of diffuser blades are connected with the inner wall of the diffuser outer ring and the outer wall of the diffuser inner ring correspondingly, and the diffuser outer ring comprises an outer ring part and a bent body part which are coaxially connected; the free end, facing the inner cavity of the combustion chamber, of the bent body part extends towards one side of the axis of the outer ring part, and a first round clamping groove is formed in the bent body part. According to the diffuser uniform in air inlet, the free end of the outer ring part communicates with the external environment of a combustion chamber, the free end of the bent body part communicates with the environment of an inner cavity of the combustion chamber, so that when airflow is in a hollow interlayer between the bent body part and an inner ring of the diffuser, the airflow is guided to flow towards one side of the axis of the outer ring part, and the flowing direction of the airflow is changed; and the problem that airflow enters asymmetrically from two channels on the front wall and the rear wall and the head of the runoff configuration combustion chamber due to the fact that airflow directly flows into the combustion chamber is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of diffusers, and in particular relates to a diffuser with uniform air intake and a radial flow combustion chamber. Background Art

[0002] With the advancement of aviation engine technology, the power-to-weight ratio of turboshaft engines continues to increase, which requires the combustion chamber to develop in the direction of higher temperature rise and smaller axial space occupation in order to obtain better engine performance. The current average outlet temperature of the combustion chamber has reached 1900K, and it will rise further in the future. The heat capacity of the combustion chamber continues to increase, which brings huge challenges to the design of the combustion chamber. Direct-flow and recirculating combustion chambers are commonly used structural layout forms for turboshaft engines. The direct-flow combustion chamber occupies a large axial space, which is not conducive to improving the rotor dynamics performance of the engine; the recirculating combustion chamber has a large cooling area, which is not conducive to increasing the temperature rise of the combustion chamber. The radial flow combustion chamber is an innovative design based on the recirculating combustion chamber to meet the performance design requirements of the higher temperature rise combustion chamber. At the same time, it can shorten the length of the engine shaft system and reduce the weight of the flame tube, which is conducive to improving the power-to-weight ratio of the turboshaft engine.

[0003] Since the distance between the head of the flame tube of the radial flow combustion chamber and the inlet of the diffuser is relatively close, the airflow from the diffuser entering the two channels on the front and rear walls of the flame tube is asymmetric, and the airflow entering the head is circumferentially asymmetric, causing the uniformity of the flow field in the flame tube to deteriorate, which directly affects the full combustion and the uniformity of the outlet temperature field.

[0004] In view of this, overcoming the defects of the above-mentioned prior art is an urgent problem to be solved in the field of this technology. Summary of the invention

[0005] In view of the above problems, the present invention proposes a diffuser with uniform air intake, comprising: a diffuser outer ring, diffuser blades, and a diffuser inner ring;

[0006] The diffuser outer ring and the diffuser inner ring are coaxially arranged and sleeved with a gap, and two ends of a plurality of diffuser blades arranged in a circumferential array are respectively connected to the inner wall of the diffuser outer ring and the outer wall of the diffuser inner ring, and a hollow sandwich is formed between the inner wall of the diffuser outer ring and the outer wall of the diffuser inner ring;

[0007] The diffuser outer ring includes an outer ring portion and a curved body portion which are coaxially connected. The free end of the curved body portion toward the inner cavity of the combustion chamber extends toward one side of the axis of the outer ring portion, and the tangent of the free end of the curved body portion forms a predetermined angle with the axis of the outer ring portion. The side wall of the curved body portion is provided with a plurality of first circular grooves for assembling the nozzle.

[0008] Furthermore, two ends of the diffuser blade are respectively connected to the inner wall of the outer ring and the outer wall of the diffuser inner ring, and the connecting end surface of the outer ring and the curved body is flush with the end surface of the diffuser inner ring facing the curved body.

[0009] Furthermore, the side walls of the diffuser outer ring and the diffuser inner ring are respectively provided with a plurality of second through holes and first through holes arranged in a circumferential array, and the two ends of the diffuser blades are respectively inserted into the first through holes and the second through holes to form a fixed sleeve connection.

[0010] Furthermore, the cross section of the diffuser blade adopts a diamond structure, and the axis center line of the diffuser blade is arranged in parallel with the axis center line of the diffuser inner ring.

[0011] Furthermore, a side of the diffuser inner ring facing the curved body portion maintains a first spacing with the end of the diffuser blade on the same side, and the first spacing is greater than or equal to 0.4 times the nozzle diameter.

[0012] Furthermore, the length of the diffuser blade in the direction of the curved body portion is 1 to 2 times the diameter of the nozzle.

[0013] Furthermore, there is a second spacing between one end of the diffuser inner ring facing the curved body portion and the side wall of the first circular groove, and the second spacing is greater than 0.3 times the nozzle diameter.

[0014] Furthermore, it also includes second circular grooves, which are arranged in a circle about the axis of the diffuser outer ring, and the angle between any second circular groove and two adjacent first circular grooves is consistent.

[0015] Furthermore, the side wall of the curved body portion facing the hollow interlayer adopts an arc structure;

[0016] The starting point of the curved arc side wall is spaced a third distance from the axis of the first circular groove, the third distance is 0 to 0.2 times the nozzle diameter, and the radius of the curved arc side wall is 0.525 to 0.6 times the nozzle diameter.

[0017] The present invention also provides a radial flow combustion chamber, comprising a diffuser with uniform air intake as described above.

[0018] Compared with the prior art, the embodiments of the present invention have at least the following advantages:

[0019] The diffuser with uniform air intake of the present invention has the free end of the outer ring portion connected to the external environment of the combustion chamber, and the free end of the curved body portion connected to the environment of the inner cavity of the combustion chamber; so that the airflow maintains horizontal flow in the hollow interlayer between the outer ring portion and the inner ring of the diffuser; when the airflow is in the hollow interlayer between the curved body portion and the inner ring of the diffuser, because the tangent of the free end of the curved body portion and the axial line of the outer ring portion form a predetermined angle, the airflow is guided to flow to one side of the axial line of the outer ring portion, thereby changing the flow direction of the airflow, avoiding the airflow from flowing directly into the combustion chamber, causing the problem of asymmetric air intake of the two channels on the front and rear walls of the radial flow configuration combustion chamber and the head, and improving the uniformity of the temperature field at the combustion chamber outlet.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A cross-sectional schematic diagram of a diffuser with uniform air intake in an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of the structure of the diffuser outer ring in an embodiment of the present invention is shown;

[0024] Figure 3 A front view schematic diagram of the outer ring of the diffuser in an embodiment of the present invention is shown;

[0025] Figure 4 A cross-sectional schematic diagram of the outer ring of the diffuser in an embodiment of the present invention is shown;

[0026] Figure 5 A schematic top view of an outer ring of a diffuser in an embodiment of the present invention is shown;

[0027] Figure 6 A schematic diagram of the structure of the inner ring of the diffuser in an embodiment of the present invention is shown;

[0028] Figure 7 A schematic diagram of the structure of a diffuser blade in an embodiment of the present invention is shown;

[0029] Figure 8 A schematic diagram showing the use status of the diffuser and the radial flow combustion chamber in an embodiment of the present invention is shown.

[0030] In the figure, diffuser 1, diffuser outer ring 101, outer ring portion 1011, curved body portion 1012, diffuser blades 102, diffuser inner ring 103, first through hole 104, second through hole 105, first circular groove 106, second circular groove 107, front wall casing 2, rear wall casing 3, flame tube front wall 4, flame tube rear wall 5, nozzle 6, and head heat insulation plate 7. DETAILED DESCRIPTION

[0031] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a diffuser with uniform air intake, referring to Figure 1 In the example shown, the diffuser 1 is installed at the inlet of the combustion chamber and is assembled with the nozzle 6 to guide the air flow of the compressor to the inner cavity of the combustion chamber for ignition.

[0034] Figure 1 FIG. 4 is a cross-sectional schematic diagram of a diffuser with uniform air intake in an embodiment of the present invention, referring to FIG. Figures 1 to 6 , the diffuser 1 comprises: a diffuser outer ring 101, diffuser blades 102, and a diffuser inner ring 103;

[0035] The diffuser outer ring 101 and the diffuser inner ring 103 are coaxially arranged and sleeved with a gap, and two ends of a plurality of diffuser blades 102 arranged in a circumferential array are respectively connected to the inner wall of the diffuser outer ring 101 and the outer wall of the diffuser inner ring 103, and a hollow interlayer is formed between the inner wall of the diffuser outer ring 101 and the outer wall of the diffuser inner ring 103, which is used to guide the airflow output by the compressor to enter the combustion chamber through the hollow interlayer;

[0036] The diffuser outer ring 101 includes an outer ring portion 1011 and a curved body portion 1012 which are coaxially connected. The free end of the curved body portion 1012 toward the inner cavity of the combustion chamber extends toward the axis of the outer ring portion 1011, and the tangent of the free end of the curved body portion 1012 forms a predetermined angle with the axis of the outer ring portion 1011. The side wall of the curved body portion 1012 is provided with a plurality of first circular grooves 106 for assembling the nozzle 6.

[0037] During actual use of the diffuser of the present application, the outer wall of the diffuser outer ring 101 and the inner wall of the diffuser inner ring 103 are respectively fitted and sleeved with the inner wall of the combustion chamber inlet, and the diffuser and the combustion chamber are fixed by bolts.

[0038] The free end of the outer ring 1011 is connected to the external environment of the combustion chamber, and the free end of the curved body 1012 is connected to the environment of the inner cavity of the combustion chamber. When the external airflow passes through the hollow interlayer between the inner wall of the diffuser outer ring 101 and the outer wall of the diffuser inner ring 103, the airflow maintains horizontal flow in the hollow interlayer between the outer ring 1011 and the diffuser inner ring 103; when the airflow is in the hollow interlayer between the curved body 1012 and the diffuser inner ring 103, because the tangent of the free end of the curved body 1012 and the axis of the outer ring 1011 are at a predetermined angle, the airflow is guided to flow to one side of the axis of the outer ring 1011, and the flow direction of the airflow is changed, so as to avoid the airflow flowing directly into the combustion chamber, causing the problem of asymmetric air intake of the two channels on the front and rear walls of the radial flow configuration combustion chamber and the head.

[0039] The diffuser proposed in the present invention guides the airflow to turn and flow toward the middle position of the inner cavity of the combustion chamber, causing the airflow to be divided into two symmetrical airflows in the middle position, so that the airflows in the two channels on the front and rear walls of the combustion chamber and the head remain symmetrical, thereby improving the uniformity of the temperature field at the combustion chamber outlet.

[0040] In this embodiment, two ends of the diffuser blade 102 are connected to the inner wall of the outer ring portion 1011 and the outer wall of the diffuser inner ring 103 respectively, and the connecting end surface of the outer ring portion 1011 and the curved body portion 1012 is flush with the end surface of the diffuser inner ring 103 facing the curved body portion 1012.

[0041] refer to Figure 1 , a schematic cross-sectional view of the diffuser outer ring 101 and the diffuser inner ring 103 is shown. In the figure, the cross sections of the outer ring portion 1011 and the diffuser inner ring 103 are arranged in an up-and-down alignment in the vertical direction, and there is no alignment interval between the cross sections of the curved body portion 1012 and the diffuser inner ring 103 in the vertical direction. By limiting the length of the diffuser inner ring 103, a turning reserved space is provided for the curved body portion 1012 to guide the airflow, thereby ensuring the smooth turning flow of the airflow.

[0042] Correspondingly, the side walls of the diffuser outer ring 101 and the diffuser inner ring 103 are respectively provided with a plurality of second through holes 105 and first through holes 104 arranged in a circumferential array, and the two ends of the diffuser blades 102 are respectively inserted into the first through holes 104 and the second through holes 105 to form a fixed sleeve connection.

[0043] exist Figure 4 and Figure 6In the example shown, the plurality of first through holes 104 and the plurality of second through holes 105 are arranged in a one-to-one correspondence; in the production and processing of the diffuser of the present application, the first through hole 104 and the second through hole 105 are first opened, and the two ends of the diffuser blade 102 are respectively inserted into the first through hole 104 and the second through hole 105 to form a preliminary fixation; illustratively, welding is used to fix the diffuser blade 102 to the first through hole 104 and the second through hole 105, and the welding operation can be directly performed on the outer wall of the diffuser outer ring 101 and the inner wall of the diffuser inner ring 103, which reduces the processing difficulty of the diffuser itself, and only reasonable grinding is required later without affecting the use of the diffuser.

[0044] Among them, reference Figure 7 The cross section of the diffuser blade 102 adopts a diamond structure, and the axis of the diffuser blade 102 is arranged in parallel with the axis of the diffuser inner ring 103. On the basis of using the diffuser blade 102 to connect the diffuser outer ring 101 and the diffuser inner ring 103 to form a whole, the diffuser blade 102 itself has a diamond structure to achieve a rectifying effect on the airflow with a circumferential airflow angle output by the compressor, reduce the circumferential component velocity of the airflow output by the compressor, and improve the stability of the airflow in the process of entering the inner cavity of the combustion chamber and the stability of the airflow in the inner cavity of the combustion chamber.

[0045] The side of the diffuser inner ring 103 facing the curved body portion 1012 maintains a first spacing L1 with the end of the diffuser blade 102 on the same side, and the first spacing L1 is set to be greater than or equal to 0.4 times the diameter D0 of the nozzle 6. Exemplarily, the first spacing L1 is 0.4 times the diameter D0 of the nozzle 6. After the diffuser blade 102 changes the circumferential airflow angle of the compressor output airflow, a certain buffer space is given to the changed airflow before it contacts the curved body portion 1012, further improving the stability of the airflow passing through the hollow interlayer.

[0046] Correspondingly, the length of the diffuser blade 102 in the direction of the curved body portion 1012 is 1 to 2 times the diameter D0 of the nozzle 6, so as to ensure that the diffuser blade 102 has a sufficient depth to ensure the effect of changing the circumferential airflow angle of the airflow.

[0047] exist Figure 1 In the example shown, in combination with the design of maintaining a first spacing L1 between one side of the diffuser blade 102 and the end portion on the same side of the diffuser blade 102, a second spacing L2 is further set between one end of the diffuser inner ring 103 facing the curved body portion 1012 and the side wall of the first circular groove 106, and the second spacing L2 is greater than 0.3 times the diameter D0 of the nozzle 6.

[0048] While further increasing the airflow buffer space, the first circular groove 106 is provided to limit the position of the nozzle 6, thereby preventing the side wall of the nozzle 6 from abutting against the end wall of the diffuser inner ring 103 and obstructing the flow of the airflow.

[0049] refer to Figure 1 , Figure 2 and Figure 3 In order to ensure the circumferential consistency of the air intake of the nozzle 6 , the axis of the first circular groove 106 is coaxially arranged with the axis of the nozzle 6 .

[0050] Also refer to Figure 5 Considering the thermal expansion deformation that may occur to the flame tube in a high temperature environment when hot, a gap of 0.4 mm to 0.5 mm is reserved between the inner wall of the first circular groove 106 and the side wall of the nozzle 6, that is, the difference between the diameter D1 of the inner wall of the first circular groove 106 and the outer diameter D0 of the nozzle 6 is 0.8 to 1.0 mm, so that the first circular groove 106 and the nozzle 6 form a gap assembly, providing sufficient space for the expansion and deformation of the flame tube.

[0051] Correspondingly, in the present application, a plurality of first circular grooves 106 are arranged in a circular array about the axis of the diffuser outer ring 101. When designing the diffuser outer ring 101, it is necessary to first obtain a set number of nozzles 6 of M, and calculate the center angle of adjacent first circular grooves 106 as θ=360° / (2M).

[0052] In addition, reference Figure 3 Due to the monitoring operation requirements, it is also necessary to add a test probe on the combustion chamber casing to monitor the vicinity of the diffuser outlet. At this time, a second circular groove 107 is added to form an assembly with the test probe, and the second circular grooves 107 are arranged in a circle about the axis of the diffuser outer ring 101, and the angle between any second circular groove 107 and two adjacent first circular grooves 106 is consistent.

[0053] In this embodiment, reference Figure 4 In order to avoid the formation of a low-speed recirculation zone when the airflow is guided by the curved body 1012 to turn, the side wall of the curved body 1012 facing the hollow interlayer adopts an arc structure to guide the fluid.

[0054] It should be noted that the combustion chamber includes a combustion chamber front wall casing 2, a combustion chamber rear wall casing 3, a flame tube front wall 4, a flame tube rear wall 5 and a head heat insulation plate 7. The incoming air from the compressor enters the combustion chamber after being decelerated and diffused through the diffuser 1, and is fully mixed with the fuel in the space surrounded by the flame tube front wall 4, the flame tube rear wall 5 and the head heat insulation plate 7 to complete the combustion process.

[0055] Considering that the fuel nozzle 6 is located at the center of the head heat shield 7, the outer ring portion 1011 of the diffuser 1 and the inner ring 103 of the diffuser are arranged in parallel with the head heat shield 7, and the arc angle of the arc side wall of the curved body portion 1012 is 90°, which achieves a guiding effect of turning the airflow 90°, so that the airflow direction is changed from a direction perpendicular to the axis of the nozzle 6 to a direction consistent with the direction axis of the nozzle 6.

[0056] At the same time, the starting point of the arc side wall of the curved body portion 1012 is spaced a third distance from the axial centerline of the first circular groove 106, and the third distance is 0 to 0.2 times the diameter of the nozzle 6. The radius of the arc side wall of the curved body portion 1012 is 0.525 to 0.6 times the diameter of the nozzle 6.

[0057] The diffuser proposed in the present invention guides the airflow to turn and guides the airflow to the middle position of the inner cavity of the combustion chamber, so as to cause the airflow to flow to the middle position of the head heat insulation plate 7 and maintain the same direction as the output end of the nozzle 6, so that the airflow is evenly divided into two symmetrical airflows at the middle position of the head heat insulation plate 7, and the two symmetrical airflows flow into the front wall casing 2 and the rear wall casing 3 respectively under the obstruction of the head heat insulation plate 7, so as to realize a symmetrical and stable flow state of the airflow and improve the uniformity of the temperature field at the combustion chamber outlet.

[0058] In addition, reference Figure 8 The present invention also proposes a radial flow combustion chamber, including a diffuser with uniform air intake as described above. In the figure, the arrow indicates the flow direction of the airflow, and it can be seen that a single airflow is divided into two airflows through the diffuser 1, and the airflows are symmetrical.

[0059] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of multiple components or the interaction relationship of multiple components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be understood that all terms used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present invention.

[0062] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A diffuser with uniform air intake, which is installed at the inlet of a combustion chamber and forms an assembly with a nozzle (6), characterized in that: The diffuser comprises: a diffuser outer ring (101), diffuser blades (102), and a diffuser inner ring (103); The diffuser outer ring (101) and the diffuser inner ring (103) are coaxially arranged and sleeved in a gap manner, and two ends of a plurality of diffuser blades (102) arranged in a circumferential array are respectively connected to the inner wall of the diffuser outer ring (101) and the outer wall of the diffuser inner ring (103), and a hollow sandwich is formed between the inner wall of the diffuser outer ring (101) and the outer wall of the diffuser inner ring (103); The diffuser outer ring (101) comprises an outer ring portion (1011) and a curved portion (1012) which are coaxially connected. The free end of the curved portion (1012) facing the inner cavity of the combustion chamber extends toward one side of the axis of the outer ring portion (1011), and the tangent of the free end of the curved portion (1012) forms a predetermined angle with the axis of the outer ring portion (1011). The side wall of the curved portion (1012) is provided with a plurality of first circular grooves (106) for assembling the nozzle (6).

2. The diffuser with uniform air intake according to claim 1, characterized in that: The two ends of the diffuser blade (102) are respectively connected to the inner wall of the outer ring portion (1011) and the outer wall of the diffuser inner ring (103), and the connecting end surface of the outer ring portion (1011) and the curved body portion (1012) is flush with the end surface of the diffuser inner ring (103) facing the curved body portion (1012).

3. The diffuser with uniform air intake according to claim 2, characterized in that: The side walls of the diffuser outer ring (101) and the diffuser inner ring (103) are respectively provided with a plurality of second through holes (105) and first through holes (104) arranged in a circumferential array, and the two ends of the diffuser blade (102) are respectively inserted into the first through hole (104) and the second through hole (105) to form a fixed sleeve connection.

4. The diffuser with uniform air intake according to claim 2, characterized in that: The cross section of the diffuser blade (102) adopts a rhombus structure, and the axis center line of the diffuser blade (102) is arranged in parallel with the axis center line of the diffuser inner ring (103).

5. The diffuser with uniform air intake according to claim 4, characterized in that: The side of the diffuser inner ring (103) facing the curved body portion (1012) maintains a first spacing with the end of the diffuser blade (102) on the same side, and the first spacing is greater than or equal to 0.4 times the diameter of the nozzle (6).

6. The diffuser with uniform air intake according to claim 4, characterized in that: The length of the diffuser blade (102) in the direction of the curved body portion (1012) is 1 to 2 times the diameter of the nozzle (6).

7. The diffuser with uniform air intake according to claim 6, characterized in that: A second spacing is provided between one end of the diffuser inner ring (103) facing the curved body portion (1012) and the side wall of the first circular groove (106), and the second spacing is greater than 0.3 times the diameter of the nozzle (6).

8. The diffuser with uniform air intake according to claim 1, characterized in that: It also includes second circular grooves (107), which are arranged in a circle about the axis of the diffuser outer ring (101), and the included angle between any second circular groove (107) and two adjacent first circular grooves (106) is consistent.

9. The diffuser with uniform air intake according to claim 1, characterized in that: The side wall of the curved body portion (1012) facing the hollow interlayer adopts an arc structure; The starting point of the arc side wall of the curved body portion (1012) is spaced from the axial center line of the first circular groove (106) by a third distance, the third distance being 0 to 0.2 times the diameter of the nozzle (6), and the radius of the arc side wall of the curved body portion (1012) being 0.525 to 0.6 times the diameter of the nozzle (6).

10. A radial flow combustion chamber, characterized in that: It comprises a diffuser with uniform air intake as described in any one of claims 1 to 9.

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