Twisted LOBE convergent-divergent nozzle for an ejector and a method thereof

Abstract

The present invention discloses an ejector nozzle (100) comprising a circular-twisted lobed section in divergent section of convergent-divergent nozzle or convergent section of converging nozzle of ejector (100), and a method (400) thereof. Multiple lobes (202) are formed extending through the throat of the ejector nozzle (Convergent-Divergent) (100). The lobes (202) comprise a swirl or twist, based on a predetermined twist angle. The twisted lobe ejector nozzle (100) results in an enhanced mixing and momentum exchange of a primary and secondary fluid, which results in an increased entrainment ratio. Advantageously, the twisted lobe ejector nozzle (100) minimizes backflow of the fluids in the ejector (100).

Description

TWISTED LOBE CONVERGENT-DIVERGENT NOZZLE FOR AN EJECTOR AND A METHOD THEREOF

[0001] The field of invention generally relates to a convergent-divergent nozzle for an ejector and a method thereof. More specifically, it relates to a convergent-divergent nozzle with circular-twisted lobes.

[0002] Refrigerators and air-conditioners play an essential role in life, and their application is seen in cold storage, food preservation, processing, and many industrial processes. Most refrigeration and air-conditioning units work on the vapour compression refrigeration principle, which utilizes a compressor that consumes electrical energy (high-grade energy). There is a need for refrigeration systems utilizing renewable energy because of increasing energy crises and environmental pollution. The vapour jet refrigeration system (VJRS) is one such kind of system that utilizes thermal energy such as solar energy, waste heat, etc., to run the thermal compressor to produce refrigeration.

[0003] One potential solution to address the global warming issue involves the development of refrigeration systems that utilize solar energy, waste thermal energy, etc as their power source. Ongoing research primarily focuses on absorption machines, including LiBr-H2O and H20-NH3 systems. However, the construction, installation, and maintenance of these systems can be costly. An alternative approach gaining attention is the utilization of ejector cycles, known for their durability and cost-effectiveness. Despite having relatively lower Coefficient of Performance (COP) values, the expenses associated with solar energy, waste-heat-powered ejector-refrigeration systems might become competitive with traditional cycles.

[0004] Ejector cycles employ environmentally friendly refrigerants like R134a, R1234yf, etc., and thus mitigate concerns related to ozone depletion. This approach could hold the potential to provide a more sustainable solution while managing costs effectively.

[0005] Although the ejector has a simple construction, the flow of liquids inside the ejector is complicated by turbulent mixing of fluids, supersonic shock interactions, and condensation within a two-phase flow regime.

[0006] Some systems implemented a swirl generator to create a swirl motion in the primary fluid. Other existing systems have tried to address this problem. However, their scope was limited to trying to restrict the primary flow, which caused a pressure drop and thus required more pumping power. Hence, performance benefits in such systems were compensated by additional pumping, which increases the overall costs, power consumption, repair and maintenance, etc.

[0007] Currently, existing systems do not succeed in providing an easy-to-use ejector with lesser number of components, which provides a high entrainment ratio.

[0008] Thus, in light of the above discussion, it is implied that there is need for a system and method for an ejector nozzle, which is reliable and does not suffer from the problems discussed above.Object of Invention

[0009] The principal object of this invention is to provide a circular-twisted lobed section in a nozzle to be used in an ejector.

[0010] A further object of the invention is to provide a circular-twisted lobed ejector which functions as a thermal compressor, for expanding high-pressure fluid through the primary nozzle causing an entrainment of the secondary fluid.

[0011] Another object of the invention is to provide the circular-twisted lobed ejector which enhances the shearing effect and momentum exchange, thus enhancing the entrainment ratio with a twisted-lobed nozzle.

[0012] Another object of the invention is to provide the circular-twisted lobed ejector which can enhance mixing and momentum exchange between primary and secondary fluids.

[0013] Another object of the invention is to provide the circular-twisted lobed ejector with lobe structures having the advantage of creating a pressure gradient at a tip and crest, where the pressure gradient causes the motion of particles from the lobe’s tip to the crest, thus forming a span-wise vortex.

[0014] This invention is illustrated in the accompanying drawings, throughout which, like reference letters indicate corresponding parts in the various figures.

[0015] The embodiments herein will be better understood from the following description with reference to the drawings, in which:Fig. 1

[0016] depicts / illustrates a schematic diagram of an ejector, in accordance with an embodiment;Fig. 2a

[0017] [Figure 2a] depicts / illustrates a perspective view of a 3-lobed 45° twist convergent-divergent nozzle, in accordance with an embodiment;Fig. 2b

[0018] [Figure 2b] depicts / illustrates a transverse view of the 3-lobed 45° twist convergent-divergent nozzle, in accordance with an embodiment;Fig. 2c

[0019] [Figure 2c] depicts / illustrates a transverse view of the 3-lobed 45° twist convergent-divergent nozzle, in accordance with an embodiment;Fig. 2d

[0020] [Figure 2d] depicts / illustrates a side view of the 3-lobed 45° twist convergent-divergent nozzle, in accordance with an embodiment;Fig. 3a

[0021] [Figure 3a] depicts / illustrates a perspective view of a 4-lobed 45° twist convergent-divergent nozzle, in accordance with an embodiment;Fig. 3b

[0022] [Figure 3b] depicts / illustrates a transverse view of the 4-lobed 45° twist convergent-divergent nozzle, in accordance with an embodiment;Fig. 3c

[0023] [Figure 3c] depicts / illustrates a side view of the 4-lobed 45° twist convergent-divergent nozzle, in accordance with an embodimentFig. 4

[0024] illustrates a method for a multiple-lobe twisted convergent-divergent nozzle, in accordance with an embodiment;Fig. 5a

[0025] illustrates a graphical representation of comparison of static pressures of different nozzles, in accordance with an embodiment;Fig. 5b

[0026] illustrates a graphical representation of comparison of velocity magnitude of different nozzles, in accordance with an embodiment;Fig. 5c

[0027] illustrates a graphical representation of comparison of wall shear of different nozzles, in accordance with an embodiment;Fig. 6

[0028] illustrates a graphical representation of comparison of different planes of different nozzles, in accordance with an embodiment;Fig. 7

[0029] illustrates a graphical representation of comparison of double choking condition of different nozzles, in accordance with an embodiment;Fig. 8

[0030] illustrates a graphical representation of 3D pictorial form of Mach Number contours for comparison of different nozzles, in accordance with an embodiment.Statement of Invention

[0031] The present invention discloses a twisted lobe convergent-divergent nozzle for an ejector and a method thereof. The nozzle ejector comprises a primary nozzle inlet configured to direct a low velocity, high-pressure primary fluid into the ejector nozzle, a secondary ejector inlet configured to direct a low-pressure secondary fluid into the ejector nozzle, a nozzle exit position configured for converging or mixing space for entrainment of the low-pressure secondary flow, an suction chamber comprising a convergent or convergent-divergent section of the primary nozzle, wherein the suction chamber is configured to provide volumetric space to the secondary fluid to get entrained into the ejector, and a diffuser section comprising a divergent section of the ejector nozzle, wherein the diffuser section is configured to provide a gradual increase in pressure of the mixed primary and secondary fluids.Detailed Description

[0032] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and / or detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

[0033] The present invention discloses a nozzle for an ejector, comprising a circular-twisted lobed section in at least one of a convergent or divergent section of the ejector nozzle. Multiple lobes are formed throughout a throat of the ejector nozzle. The lobes comprise a swirl or twist, based on a predetermined twist angle. The twisted lobe ejector nozzle results in an enhanced mixing and momentum exchange of a primary and secondary fluid, which results in an increased entrainment ratio. Advantageously, the twisted lobe ejector nozzle eliminates any backflow of the fluids based on the back pressure to the ejector nozzle.

[0034] The present invention develops a convergent-divergent nozzle to enhance mixing and momentum exchange between primary and secondary fluids. A lobed structure has the advantage of creating a pressure gradient at a tip and crest. The pressure gradient causes the motion of particles from the lobe’s tip to the crest, thus forming a span-wise vortex. Secondary fluid surrounding the lobes gets benefits with this vortex and comes in contact with the core of primary fluid, decaying the core velocity and further spreading flow, resulting in enhanced mixing.

[0035] depicts / illustrates a schematic diagram of an ejector nozzle 100, in accordance with an embodiment. The ejector nozzle 100 may be used in any system which requires an ejector to be used as an alternative to a compressor.

[0036] The ejector nozzle 100 comprises a primary nozzle inlet 102, a secondary ejector inlet 104, a suction chamber 106, a constant area segment 108, a diffuser section 110, and a nozzle exit position 116.

[0037] The primary nozzle inlet 102 is used to direct flow of a low velocity, high pressure primary fluid to create a primary flow going into the ejector nozzle 100. Further, one or more parameters of the ejector nozzle 100 such as a primary nozzle throat diameter 112 and primary nozzle exit cross-sectional area 114 are chosen based on the requirements of the system comprising the ejector nozzle 100.

[0038] The secondary ejector inlet 104 is used to direct a low pressure secondary fluid to create a secondary flow going into the ejector nozzle 100.

[0039] In an embodiment, one or more ejector nozzle parameters or lobe parameters are determined. The lobe parameters comprise at least one of number of lobes, shape, height, dimension, crest dimensions, tip height, among others.

[0040] Further, in an embodiment, the ejector nozzle 100 comprises a circular-twist in a throat of the divergent section, along with multiple lobes present along the divergent section. The diffuser lobes are provided throughout a throat of the ejector nozzle with a swirl or twist, based on a predetermined twist angle.

[0041] In an embodiment, the twisted lobes may be present through one or more of the convergent section, and the divergent section of the ejector nozzle 100. The twisted lobes configured for mixing and entraining the primary fluid and the secondary fluid by creating a rotational flow.

[0042] In an embodiment, the twisted lobes may be present through one or more of the convergent, divergent, or convergent-divergent sections of the convergent-divergent nozzle or a convergent section of a converging nozzle of the ejector.

[0043] In an embodiment, the twisted lobe comprises a tip and a crest and a lobe space between the tip and the crest to create a pressure gradient at the tip and the crest. The pressure gradient creates a movement of the primary fluid and the secondary fluid through the lobe space. The secondary fluid surrounding the lobes gets benefits with spin-wise vortex by the pressure gradient, inducing it to come into contact with the core of the primary fluid, decaying the core velocity and further spreading of flow, resulting in enhanced mixing of primary fluid and secondary fluid.

[0044] In an embodiment, there is a gradual increase in the cross-sectional area of the twisted lobe divergent section, in order to enable a smooth expansion of the high pressure primary fluid flowing through the divergent section of convergent-divergent nozzle.

[0045] In an embodiment, the twisted lobe comprises a predetermined twist angle of approximately 20 - 70 degrees.

[0046] In an embodiment, the twisted lobe comprises a predetermined twist angle of approximately 35 - 55 degrees.

[0047] In an embodiment, the twisted lobe comprises a predetermined twist angle of approximately 45 degrees.

[0048] In an embodiment, the twisted-circular-lobed ejector nozzles 100 comprise a similar exit cross-sectional area for all lobes in the convergent-divergent nozzle, to achieve the same flow Mach Number at the end of the divergent section.

[0049] Advantageously, the twisted circular lobed nozzles 100 enable Mach 1.9 swirling which gives a rotational motion to the whole expanded flow. Simultaneously, the fluid moves from a lobe crest to a lobe trough because of a pressure gradient.

[0050] Further, there is a secondary fluid surrounding the expanded primary flow, wholly present in between the lobe space, which has a rotational motion because of the pressure gradient. This results in simultaneous swirling, thus enhancing the mixing or entrainment between the primary and the secondary fluid.

[0051] Advantageously, the swirled primary flow entrains the surrounding secondary fluid with enhanced momentum and energy transfer. Further the 3-lobed ejector nozzle (depicted in fig.s 2A-D) is single choked with a lower critical condenser / back pressure.

[0052] Advantageously, the 3-lobed ejector nozzle (depicted in fig.s 2A-D) comprising a 45° twist angle results in a 7% increment of entrainment ratio with low critical back pressure, as compared to a conventional circular nozzle ejector.

[0053] A 4-lobed ejector nozzle (depicted in fig.s 3A-C) with a 45° twist nozzle ejector shows a 4% decrement of entrainment ratio with higher critical back pressure, as compared to a conventional circular nozzle ejector.

[0054] Another advantage is that a location of mixing of the primary and secondary fluids shifts upstream in the constant area mixing chamber of the ejector nozzle 100.

[0055] The suction chamber 106 comprises the convergent or convergent-divergent section of the ejector nozzle 100.

[0056] The constant area segment 108 comprises an area of constant cross-sectional dimension.

[0057] In diffuser section 110, there is a gradual raise in pressure of the mixed primary and secondary fluid.

[0058] The nozzle exit position 116 determines the expansion angles and the converging / mixing space for the entrainment of the secondary flow.

[0059] The high-pressure primary fluid undergoes expansion via the primary nozzle inlet 102, resulting in a substantial pressure drop. This, in turn, establishes a negative pressure differential between the secondary fluid and the expanded primary fluid. The entrainment of the secondary fluid is driven by the negative pressure, and an exchange of momentum occurs through an interaction of shear forces between the primary and secondary fluids. The combined mechanism of pressure difference and fluid interaction results in an entrainment of the secondary fluid within the system comprising the ejector nozzle 100.

[0060] Advantageously, in the present nozzle 100 design, the incoming primary flow is not restricted, which avoids any drop in flow pressure. An absence of a pressure drop indicates that no additional resources and costs need to be spent for providing extra pumping power.

[0061] With the designed nozzle, we achieve Mach 1.9, swirling gives a rotational motion to the whole expanded flow, and simultaneously the fluid particles moving from lobe tip to crest because of the pressure gradient. There is a secondary fluid surrounding the expanded primary flow, it is wholly present in between the lobe space, which has a rotational motion because of the pressure gradient and simultaneously these being swirled, enhancing the mixing between primary and secondary fluid.

[0062] The following tables depicts approximate dimensions of various parameters of the ejector nozzle 100.ParameterValuePrimary nozzle throat diameter 1122.00 mmPrimary nozzle exit cross-sectional area 1147.06 mm2Nozzle exit position 116-6.0 mmMixing chamber diameter 1184.80 mmMixing chamber length 12041.39 mmDiffuser length 12295.00 mmDiffuser exit diameter 12418.00 mmSuction chamber convergent angle30°

[0063] depicts / illustrates a perspective view of a 3-lobed 45° twist convergent-divergent nozzle 200, in accordance with an embodiment.

[0064] depicts / illustrates a transverse view of the 3-lobed 45° twist convergent-divergent nozzle 200, in accordance with an embodiment.

[0065] In an embodiment, each lobe 202 comprises a crest and a trough. Further, one or more lobe dimensions such as crest height, crest angle, and trough height, among others, may be predetermined based on the application of the ejector nozzle 100.

[0066] depicts / illustrates a transverse view of the 3-lobed 45° twist convergent-divergent nozzle 200, in accordance with an embodiment. The 3-lobed nozzle 200 comprises three lobes 202 / 1, 202 / 2 and 202 / 3, at the end of the diffuser section 110.

[0067] depicts / illustrates a side view of the 3-lobed 45° twist convergent-divergent nozzle 200, in accordance with an embodiment. Approximate measurements of parameters of the ejector nozzle 200 are provided as depicted in the figure.

[0068] depicts / illustrates a perspective view of a 4-lobed 45° twist convergent-divergent nozzle 300, in accordance with an embodiment.

[0069] depicts / illustrates a transverse view of the 4-lobed 45° twist convergent-divergent nozzle 300, in accordance with an embodiment. The 4-lobed nozzle 300 comprises four lobes 302 / 1, 302 / 2, 302 / 3 and 302 / 4, at the end of the diffuser section 110.

[0070] In an embodiment, each lobe 302 comprises a crest and a trough. Further, one or more lobe dimensions such as crest height, crest angle, and trough height, among others, may be predetermined based on the application of the ejector nozzle 100.

[0071] depicts / illustrates a side view of the 4-lobed 45° twist convergent-divergent nozzle 300, in accordance with an embodiment. Approximate measurements of parameters of the ejector nozzle 300 are provided as depicted in the figure.

[0072] Advantageously, the 3-lobed 45° twist ejector nozzle 200 performs better than the conventional nozzle and the 4-lobed ejector nozzle 300. The 3-lobed 45° twist ejector nozzle 200 provides an enhanced Entrainment Ratio (ET) of 7%, which results in a higher suction of the secondary fluid. Additionally, the 3-lobed 45° twist ejector nozzle 200 enables a low critical back pressure.

[0073] Further, by keeping the secondary pressure constant and increasing primary and back pressure, a decrement in the entrainment ratio is seen. For fixed ejector geometry, increasing the primary pressure also increases the primary fluid mass flow rate, thus decreasing the entrainment ratio.

[0074] In an embodiment, the ejector nozzle 100 is used in a refrigeration or air conditioning system which comprises several key components: a generator, an ejector, a condenser, an expansion device, and a liquid pump. The generator plays the role of converting liquid into vapor by heat absorption. This vapor is then directed through the ejector's convergent-divergent nozzle 100, resulting in a high-velocity stream. This stream effectively entrains the vaporized refrigerant that originates from the evaporator. The two fluid streams mix within the mixing chamber and subsequently experience a pressure increase as a shock is formed, followed by a flow through the diffuser section of the ejector nozzle 100.

[0075] During this process, the pressurized fluid undergoes condensation in the condenser. A proportion of the resulting condensate is expanded through an expansion device, to the evaporator, where it facilitates the desired refrigeration effect. The remaining liquid is then efficiently pumped back to the generator via a liquid pump, closing the cycle and sustaining the system's operation.

[0076] illustrates a method 400 for a multiple-lobe twisted convergent-divergent nozzle, in accordance with an embodiment.

[0077] The method begins with directing a primary fluid into the ejector nozzle, by a primary nozzle inlet, as depicted at step 402. Further, the method 400 discloses directing a secondary fluid into the ejector nozzle, by a secondary ejector inlet, as depicted at step 402. Further, the method 400 discloses increasing pressure of the primary fluid and secondary fluid, by a diffuser section, as depicted at step 404. Subsequently, the method 400 discloses mixing and entraining of the primary fluid and secondary fluid by creating a rotational flow through at least three twisted lobes, as depicted at step 406.

[0078] illustrates a graphical representation 500 of comparison of static pressures of different nozzles, in accordance with an embodiment.

[0079] As depicted in the depicted representation 500, the 3-lobed ejector nozzle 200 provides better static pressure as compared to a conventional nozzle or a 4-lobed ejector nozzle 300.

[0080] illustrates a graphical representation 502 of comparison of velocity magnitude of different nozzles, in accordance with an embodiment.

[0081] As depicted in the depicted representation 502, the 3-lobed ejector nozzle 200 provides better velocity magnitude as compared to a conventional nozzle or a 4-lobed ejector nozzle 300, with reduced shock.

[0082] illustrates a graphical representation of comparison of wall shear of different nozzles, in accordance with an embodiment.

[0083] As depicted in the depicted representation 504, the 3-lobed ejector nozzle 200 provides better wall shear results as compared to a conventional nozzle or a 4-lobed ejector nozzle 300.

[0084] A sudden drop in the wall shear can be found out at the entrance of constant area mixing chamber. The presence of oblique shock is a potential reason for its occurrence. Further, a peak in wall shear can be seen in the presence of expansion fan. A drop in the wall shear at the entrance of the diffuser is also seen, which may be potentially caused by an adverse pressure gradient.

[0085] illustrates a graphical representation of comparison of fluid streams at different planes for different nozzles, in accordance with an embodiment.

[0086] Plane 1 depicts the fluid stream at the Primary Nozzle Exit. Plane 2 depicts the fluid stream at the Constant Area Mixing Chamber (CAMC) Entrance.

[0087] Plane 3 depicts the fluid stream at the CAMC Mid-Section and Plane 4 depicts the fluid stream at the CAMC Exit.

[0088] illustrates a graphical representation 700 of comparison of Mach plots of different nozzles, in accordance with an embodiment. The Mach plots for the conventional circular nozzle and 4-lobed nozzle ejectors depict double choking. This is due to the primary nozzle getting choked in the throat of the primary nozzle and the secondary flow getting choked in the constant area section.

[0089] An occurrence of normal shock signifies that the critical back pressure for a 4- lobed with a 45° twist nozzle is more significant than the remaining two but with a compromise of entrainment ratio.

[0090] However, a 3-lobed ejector nozzle 200 results in single choking with a lower critical condenser / back pressure. The Mach contours of the 3-lobed 45° twist ejector nozzle 200 results in different flow structures, where both the contours that explain Mach 1 lines are not approaching the wall region of the constant area section. Advantageously, this signifies that the ejector nozzle 200 is operating in a single choked condition and has enhanced performance.

[0091] illustrates a graphical representation of 3D pictorial form of Mach Number contours for comparison of different nozzles, in accordance with an embodiment.

[0092] The advantages of the current invention include providing an enhanced mixing and momentum exchange of a primary and secondary fluid, which results in an increased entrainment ratio.

[0093] An additional advantage is that the twisted lobe ejector nozzle minimizes the backflow of the fluids in the ejector based on the back pressure acting over the ejector nozzle.

[0094] Applications of the current invention include any applications which require an ejector or an alternative for a compressor, such as refrigeration, air conditioning, low lift applications, pumps, oil refineries, venting applications, gas mixing and dilution applications, vacuum applications, etc.

[0095] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and / or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the embodiments as described here.

Claims

An ejector nozzle (100) for mixing and entraining fluids, comprising:a suction chamber (106) comprising a convergent section or convergent-divergent section, a primary nozzle inlet (102) and a secondary ejector inlet (104);the primary nozzle inlet (102) configured to direct a primary fluid into the ejector nozzle;the secondary ejector inlet (104) configured to direct a secondary fluid into the ejector nozzle;a diffuser section (110) comprising a divergent section, configured to increase pressure of the primary fluid and secondary fluid; andat least three twisted lobes configured to mix and entrain the primary fluid and the secondary fluid to create a rotational flowThe ejector nozzle (100) as claimed in claim 1, wherein the at least three twisted lobes are present in at least one of the convergent section, the divergent section, and the convergent-divergent section.The ejector nozzle (100) as claimed in claim 1, comprising a constant area segment (108) with a uniform cross-sectional area, wherein the constant area segment (108) is configured to maintain a stable flow profile before the primary and secondary fluids enter the diffuser section (110).The ejector nozzle (100) as claimed in claim 1, wherein the twisted lobes comprise:a tip;a crest; andlobe space between the tip and the crest,wherein movement of the primary fluid and the secondary fluid through the lobe space creates a pressure gradient from the tip to the crest,wherein the pressure gradient forms a span-wise vortex from rotational motion of the primary fluid and the secondary fluid from the tip to the crest, andwherein the span-wise vortex entrains the secondary fluid with the primary fluid, for enhanced mixing of the primary fluid and the secondary fluid.The ejector nozzle (100) as claimed in claim 1, wherein the ejector nozzle (100) comprises three twisted lobes to enhance performance of the ejector nozzle (100), and improving the mixing and entrainment of the secondary fluid.The ejector nozzle (100) as claimed in claim 1, wherein the ejector nozzle (100) comprises four twisted lobes to enable double choking with higher critical condenser and back pressure, to enhance mixing with reduced entrainment of the secondary fluid.The ejector nozzle (100) as claimed in claim 1, wherein the twisted lobes comprise a predetermined angle range of approximately 20 to 70 degrees, with an optimal angle of approximately 45 degrees.The ejector nozzle (100) as claimed in claim 1, wherein the twisted lobes comprise a gradual decrease or increase in cross-sectional area in at least one of the convergent section, divergent section and convergent-divergent section to enable smooth expansion of primary fluid through the primary nozzle.A method for mixing and entraining fluids of an ejector nozzle (100), comprising:directing a primary fluid into the ejector nozzle, by a primary nozzle inlet (102);directing a secondary fluid into the ejector nozzle, by a secondary ejector inlet (104);increasing pressure of the primary fluid and secondary fluid, by a diffuser section (110); andmixing and entraining of the primary fluid and secondary fluid by creating a rotational flow through at least three twisted lobes.The method as claimed in claim 9, comprising providing the at least three twisted lobes in at least one of the convergent section, divergent section or convergent-divergent section.The method as claimed in claim 9, comprising maintaining a stable flow profile before the primary and secondary fluids entering the diffuser section (110), by a constant area segment (108).The method as claimed in claim 9, comprising:creating a pressure gradient at a tip and crest of the twisted lobes, wherein the pressure gradient causes motion of particles from the tip to the crest to form a span-wise vortex; andenabling simultaneous swirling by entraining the secondary fluid with the primary fluid through the span-wise vortex, for enhanced mixing of the primary fluid and the secondary fluid.The method as claimed in claim 9, comprising providing three twisted lobes within the ejector nozzle (100) for enhancing performance of the ejector nozzle (100) and improving the mixing and entrainment of the secondary fluid.The method as claimed in claim 9, comprising providing four twisted lobes within the ejector nozzle (100) for enabling double choking with higher critical condenser and back pressure, for enhance mixing with reduced entrainment of the secondary fluid.

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