CN109973223B - Processing method of particle separator, particle separator and aviation turboshaft engine - Google Patents
Processing method of particle separator, particle separator and aviation turboshaft engine Download PDFInfo
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- CN109973223B CN109973223B CN201910255821.2A CN201910255821A CN109973223B CN 109973223 B CN109973223 B CN 109973223B CN 201910255821 A CN201910255821 A CN 201910255821A CN 109973223 B CN109973223 B CN 109973223B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
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Abstract
The disclosure relates to a processing method of a particle separator, the particle separator and an aviation turboshaft engine, and relates to the technical field of aviation engines. The processing method comprises the following steps: providing a particle separator to be processed; carrying out pneumatic speed simulation analysis on the inside of a flow channel of the particle separator, and dividing the inside of the flow channel into a plurality of flow velocity areas according to the gas flow velocity; determining the target roughness of each flow velocity area according to the gas flow velocity of each flow velocity area; in any two flow velocity areas with different gas flow velocities, the target roughness of the flow velocity area with high gas flow velocity is not greater than the target roughness of the flow velocity area with low gas flow velocity; the roughness of each flow velocity zone of the particle separator is machined to a corresponding target roughness. On one hand, the pneumatic total pressure loss is reduced, and meanwhile, the efficiency of sand-dust separation is ensured to be unchanged; on the other hand, different areas are optimized in different degrees of surface roughness, and the processing efficiency and the economical efficiency can be effectively improved.
Description
Technical Field
The disclosure relates to the technical field of aircraft engines, in particular to a particle separator, a processing method thereof and an aircraft turboshaft engine.
Background
The front of the inlet of the turboshaft engine is generally provided with a particle separator, and the main functions of the particle separator are air inlet and foreign objects entering an air inlet of the engine, such as sand dust, leaves, birds and the like, so that the foreign objects are prevented from entering the interior of the engine, and the damage and the influence on the stable work of the engine are avoided. The pneumatic flow path of the particle separator consists of an inlet flow channel and a blade, a main flow channel and a blade, and a cleaning flow channel and a blade. The separation principle is that an inertia force field is established through a proper runner profile or a blade grid so as to achieve the purpose of separating foreign matters.
Relevant researches show that the total pressure loss of the particle separator is reduced by 1%, the maximum continuous power of the engine can be improved by 1.5-2%, and vice versa. Therefore, the total pressure loss of the particle separator is reduced to meet the index requirement, and the method has important significance for ensuring the performance of the whole machine.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a processing method of a particle separator, the particle separator and an aviation turboshaft engine, so as to reduce the total pressure loss of the particle separator and improve the overall performance of the turboshaft engine.
According to one aspect of the present disclosure, there is provided a method of processing a particle separator, comprising:
providing a particle separator to be processed;
carrying out pneumatic speed simulation analysis on the inside of a flow channel of the particle separator, and dividing the inside of the flow channel into a plurality of flow velocity areas according to the gas flow velocity;
determining the target roughness of each flow velocity area according to the gas flow velocity of each flow velocity area; in any two flow velocity areas with different gas flow velocities, the target roughness of the flow velocity area with high gas flow velocity is not larger than that of the flow velocity area with low gas flow velocity;
the roughness of each flow velocity zone of the particle separator is machined to a corresponding target roughness.
In an exemplary embodiment of the present disclosure, the performing a pneumatic velocity simulation analysis on the flow channel interior of the particle separator and dividing the flow channel interior into a plurality of flow velocity zones according to the gas flow velocity includes:
carrying out pneumatic speed simulation analysis on the interior of a flow channel of the particle separator to obtain a Mach number distribution result of the interior of the flow channel;
and carrying out region division on the interior of the flow channel according to the Mach number distribution result so as to determine a plurality of flow velocity regions.
In an exemplary embodiment of the present disclosure, the performing the area division on the inside of the flow channel according to the mach number distribution result to determine a plurality of flow velocity areas includes:
dividing the part with the equivalent Mach number value in the flow channel into a region to determine a first flow velocity region, a second flow velocity region and a third flow velocity region; wherein the average mach number value of the first flow velocity region is higher than the average mach number value of the second flow velocity region, and the average mach number value of the second flow velocity region is higher than the average mach number value of the third flow velocity region.
In an exemplary embodiment of the disclosure, the processing the roughness of each flow velocity region of the particle separator into a corresponding target roughness includes:
adjusting the roughness of the first flow velocity area to a first preset range;
adjusting the roughness of the second flow velocity region to a second preset range;
adjusting the roughness of the third flow velocity area to a third preset range;
the maximum value of the first preset range is not more than the minimum value of a second preset range, and the maximum value of the second preset range is not more than the minimum value of a third preset range.
In an exemplary embodiment of the present disclosure, the flow channel interior of the particle separator includes an inlet flow channel, a primary flow channel, and a purge flow channel; the first flow velocity region is at least partially coincident with the primary flowpath, the second flow velocity region is at least partially coincident with the inlet flowpath, and the third flow velocity region is at least partially coincident with the scavenge flowpath.
In an exemplary embodiment of the present disclosure, the first preset range is ra0.8 to ra1.6, the second preset range is ra1.6 to ra3.2, and the third preset range is ra3.2 to ra 6.3.
In an exemplary embodiment of the present disclosure, the target roughness of the flow velocity region is K'; the gas flow velocity of the flow velocity area is u0The target roughness of the flow velocity region and the gas flow velocity of the flow velocity region satisfy the following equation:
wherein, v is 14.75 × 10-6m2And/s is the aerodynamic viscosity coefficient.
According to another aspect of the present disclosure, there is provided a particle separator including a flow channel, the flow channel being internally divided into a plurality of flow velocity zones, and in any two flow velocity zones in which gas flow velocities are different, a target roughness of a flow velocity zone in which the gas flow velocity is high is not greater than a target roughness of a flow velocity zone in which the gas flow velocity is low.
In an exemplary embodiment of the present disclosure, the flow passage is internally divided into a first flow rate zone, a second flow rate zone, and a third flow rate zone;
the flow channel comprises an inlet flow channel, a main flow channel and a clearing flow channel; the first flow velocity region at least partially coincides with the primary flowpath, the second flow velocity region at least partially coincides with the inlet flowpath, and the third flow velocity region at least partially coincides with the scavenge flowpath;
the surface roughness of the main runner is Ra0.8-Ra1.6, the surface roughness of the inlet runner is Ra1.6-Ra3.2, and the surface roughness of the cleaning runner is Ra3.2-Ra6.3.
According to a further aspect of the present disclosure there is provided an aircraft turboshaft engine including a particle separator as described in any one of the above.
According to the technical scheme, the processing method of the particle separator has the advantages and positive effects that:
the present disclosure provides a processing method of a particle separator, which divides the inside of a flow channel of the particle separator to be processed according to the difference of the air flow velocity inside the flow channel, and optimizes the roughness of each flow velocity area to different degrees according to the difference of the air flow velocity. On the one hand, the method realizes the purpose of reducing the pneumatic total pressure loss only by the optimized design of the roughness of the inner surface of the flow passage of the particle separator on the premise of not changing the theoretical separation flow passage of the particle separator, and simultaneously ensures that the efficiency of sand-dust separation is unchanged; on the other hand, the surface roughness of the corresponding area is optimized in different degrees according to the different air flow speeds, so that the processing efficiency and the economy can be effectively improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 schematically illustrates a flow diagram of a method of processing a particle separator in an exemplary embodiment of the disclosure;
FIG. 2 schematically illustrates an internal structure of a flow channel of a particle separator in an exemplary embodiment of the disclosure;
FIG. 3 schematically illustrates a resulting schematic of an aerodynamic velocity simulation analysis of the interior of a flow channel of a particle separator in an exemplary embodiment of the disclosure;
FIG. 4 schematically illustrates the division of the flow channel interior into a plurality of flow velocity zones according to the pneumatic velocity simulation analysis results of FIG. 3 in an exemplary embodiment of the present disclosure;
FIG. 5 schematically illustrates the division of the flow channel interior into multiple flow velocity zones based on aerodynamic velocity simulation analysis results in exemplary embodiments of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
The terms "a," "an," "the," and "said" are used in this specification to denote the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
FIG. 1 schematically illustrates a flow diagram of a method of processing a particle separator in an exemplary embodiment of the disclosure.
The present disclosure provides a method of processing a particle separator, which may include:
s1, providing a particle separator to be processed;
s2, carrying out pneumatic velocity simulation analysis on the inside of a flow channel of the particle separator, and dividing the inside of the flow channel into a plurality of flow velocity areas according to the gas flow velocity;
s3, determining the target roughness of each flow velocity area according to the gas flow velocity of each flow velocity area; in any two flow velocity areas with different gas flow velocities, the target roughness of the flow velocity area with high gas flow velocity is not greater than the target roughness of the flow velocity area with low gas flow velocity;
s4, the roughness of each flow velocity area of the particle separator is processed into corresponding target roughness.
The processing method of the particle separator has the advantages and positive effects that:
the present disclosure provides a processing method of a particle separator, which divides the inside of a flow channel of the particle separator to be processed according to the difference of the air flow velocity inside the flow channel, and optimizes the roughness of each flow velocity area to different degrees according to the difference of the air flow velocity. On the one hand, the method realizes the purpose of reducing the pneumatic total pressure loss only by the optimized design of the roughness of the inner surface of the flow passage of the particle separator on the premise of not changing the theoretical separation flow passage of the particle separator, and simultaneously ensures that the efficiency of sand-dust separation is unchanged; on the other hand, the surface roughness of the corresponding area is optimized in different degrees according to the different air flow speeds, so that the processing efficiency and the economy can be effectively improved.
In step S1, a particle separator to be processed may first be provided. As shown in fig. 2, the present embodiment takes a bladed particle separator as an example: the pneumatic flow path of the particle separator consists of an inlet flow channel 1, a pre-rotation vane 4, a main flow channel 3, a counter-rotation vane 6, a clearing flow channel 2 and a clearing vane 5, wherein each flow channel and each vane correspond to a casing, and the particle separator is integrally formed by connecting the casings corresponding to each flow channel and each vane.
In order to ensure that the shapes of the flow channel and the blades of the particle separator real object are consistent with the three-dimensional flow field of the particle separator and the particle trajectory analysis theoretical data, the interior of the flow channel of the particle separator is firstly preprocessed. The measures taken include: the defects of square corners, bosses, gouges, welding seams and the like in the flow channel and the blades are eliminated; and clearing the reverse steps and the forward steps at the connecting part between the casings of the adjacent runners.
In general, in the production process, the flow channel and the front and rear edge parts of the blade of the particle separator inevitably have some defect structures such as square angles, bosses, welding beading, and the connection part of the flow channel has an inverted step and a smooth step, and the phenomenon of partial deviation from the theoretical flow channel blade profile exists, so that the total aerodynamic pressure loss is increased. Through the measures and by combining a certain processing means, the flow channel deviation can be reduced, the theoretical value is approached, and the pneumatic total pressure loss is reduced.
Further, in some embodiments, the object of processing by the present particle separator processing method is not limited to the bladed particle separator, depending on the actual use environment and purpose. The particle separator with structures such as pre-rotation blades or reverse rotation blades and the like is not arranged in each flow channel; or the particle separator can also be provided with a support plate inside each flow passage, wherein the support plate can comprise a plurality of blades, each blade does not have a twist angle, and each blade is distributed along the circumferential direction. The present disclosure is not limited to the specific structure of the flow channel.
In step S2, an aerodynamic velocity simulation analysis may be performed on the flow channel interior of the particle separator, and the flow channel interior may be divided into a plurality of flow velocity zones according to the gas flow velocity. The method comprises the following steps of carrying out pneumatic speed simulation analysis on the interior of a flow channel of a particle separator to obtain a Mach number distribution result of the interior of the flow channel.
The mach number distribution results are shown in fig. 3, fig. 3 being a reference made to a particle separator in a cartesian coordinate system, where the X-axis is the abscissa, representing the length, in m/m; the Y axis is a vertical coordinate and represents the length, and the unit is m/meter; mach represents Mach number. As can be seen, in the clearing flow channel, the Mach number value is generally low, and most of the Mach number value is between 0.05 and 0.15; in the main runner, the Mach number value is generally higher and mostly between 0.35 and 0.65; whereas in the inlet channel the mach number is mostly between 0.15 and 0.35. Obviously, there is a significant difference in the mach number distribution between the various flow channels.
Further, when the portion having the mach number equal to or close to the mach number is divided into one region, the division result is shown in fig. 4. The particle separator as a whole can be divided into three flow velocity zones: a first flow velocity zone 9, a second flow velocity zone 7, and a third flow velocity zone 8. The average mach number value of the first flow velocity region 9 is higher than that of the second flow velocity region 7, and the average mach number value of the second flow velocity region 7 is higher than that of the third flow velocity region 8.
Fig. 5 is obtained by combining fig. 2 with fig. 4, from which fig. 5 it can be seen that the first flow velocity zone 9 at least partially coincides with the primary flow channel 3, the second flow velocity zone 7 at least partially coincides with the inlet flow channel 1 and the third flow velocity zone 8 at least partially coincides with the scavenge flow channel 2. Here, the flow channel is divided into three flow velocity zones in consideration of the flow velocity distribution of the flow velocity zones and the processing cost, but in some embodiments, the division accuracy and the number of the flow velocity zones are not limited to the above description, and may be finer.
In other embodiments, the structures of the particle separators may be different, and the mach number distribution results obtained through the corresponding aerodynamic velocity simulation analysis may be different, so that the division of the flow velocity regions may also be different, and the flow velocity regions may be other number of flow velocity regions different from the three flow velocity regions, and the flow velocity regions may not necessarily have a specific corresponding relationship with each flow channel of the particle separator.
In step S3, determining a target roughness for each flow velocity region from the gas flow velocities of the respective flow velocity regions; and in any two flow velocity areas with different gas flow velocities, the target roughness of the flow velocity area with high gas flow velocity is not larger than that of the flow velocity area with low gas flow velocity. The relationship between the target roughness and the gas flow rate can be derived from the following theoretical derivation and practice.
Through research, the roughness of the surface of the object has certain influence on the fluid boundary layer. The layer of air flow layer in which the air flow velocity gradually decreases from the outer mainstream velocity to zero as the air flows over the solid surface is called the boundary layer. The boundary layer on the solid surface has smaller loss when being laminar flow and larger loss when being turbulent flow than when being laminar flow, so the integrity design of the surface of the flow channel firstly needs to reduce the occurrence of turbulent flow in the flow channel when the particle separator works.
The turbulent boundary layer has a very thin laminar flow layer, called laminar bottom layer, which flows in layers near the wall. If the roughness is completely within the laminar bottom layer, the roughness is hydrodynamically considered to be flow-smooth. According to this principle, it can be deduced that the height K' of the roughness particles allowed by the turbulent boundary layer is:
where K' is the target roughness of the flow velocity region, u0The gas flow rate in the flow rate region, v ═ 14.75X 10-6m2And/s is the aerodynamic viscosity coefficient.
The formula (1) shows that the height of the roughness particles at the position with low gas flow velocity can be larger, and the height of the roughness particles at the position with high gas flow velocity is smaller, so that the aims of reducing total pressure loss and improving the economy are fulfilled.
Therefore, the target roughness corresponding to the three flow velocity regions can be designed respectively: the roughness of the first flow velocity zone 9 is in a first preset range, the roughness of the second flow velocity zone 7 is in a second preset range and the roughness of the third flow velocity zone 8 is in a third preset range. The maximum value of the first preset range is not more than the minimum value of a second preset range, and the maximum value of the second preset range is not more than the minimum value of a third preset range.
For example, the particle separator of the exemplary embodiment operates with a gas flow velocity in the flow channel of between 70 and 200 m/s. By substituting these values into the formula (1), the critical roughness particle height is 10.0-5.0 μm. In addition, after multiple times of practice and by combining the theoretical data, the final determination of different flow velocity areas and target roughness ranges of the particle separator can be as follows:
the target roughness of the first flow velocity region 9 is in a first preset range Ra0.8-Ra1.6, and the first flow velocity region 9 comprises the main runner 3 and the counter-rotating blades inside the main runner 3;
the target roughness of the second flow velocity region 7 is in a second preset range Ra1.6-Ra3.2, and the second flow velocity region 7 comprises the inlet runner 1 and a pre-rotation blade inside the inlet runner 1;
the target roughness of the third flow velocity region 8 is in a third preset range of Ra3.2-Ra6.3, and the third flow velocity region 8 comprises the cleaning flow channel 2 and a cleaning blade inside the cleaning flow channel.
It should be added that, in some embodiments, the target roughness of each region may be adjusted according to the use and construction requirements, and is not limited to the above description.
Further, in step S4, the roughness of each flow velocity region of the particle separator is processed to a corresponding target roughness. Therefore, under the condition that the flow channel and the blade profile are not changed, the frictional resistance of the boundary layer is reduced through the measures, and the total pressure loss of the particle separator is reduced.
In addition, by applying the processing method of the particle separator provided by the present disclosure, the present example embodiment also performs experimental studies on the separation efficiency and the total pressure loss in pneumatic operation on a plurality of particle separators before and after the roughness optimization. The test procedure was as follows: providing three particle separators to be processed, wherein the surface roughness range of each particle separator is Ra12.5-Ra 25; testing the separation efficiency and the pneumatic total pressure loss of each particle separator; according to the processing method of the particle separator provided by the disclosure, roughness optimization design is carried out on each particle separator; and testing the separation efficiency and the pneumatic total pressure loss of each optimized particle separator again. The test results show that the separation efficiency is basically unchanged, the aerodynamic total pressure loss after the surface roughness is optimized is obviously reduced, and the test results are shown in table 1.
The data in table 1 represent the percent aerodynamic total pressure loss before and after the test for three test pieces. The design requires that the pneumatic total pressure loss of the three test pieces is not more than 2.8% through optimization; the pneumatic total pressure loss of each test piece before optimization is respectively 3.76%, 3.61% and 3.67%; the optimized pneumatic total pressure loss of each test piece is respectively 2.49%, 2.47% and 2.48%; test results show that after the three test pieces are subjected to surface roughness optimization by the method disclosed by the invention, the pneumatic total pressure loss meets the design requirements, and the improvement rate is over 30%.
Table 1 shows the pneumatic total pressure loss test values (%)
The present exemplary embodiment also provides a particle separator including a flow channel, the flow channel being divided into a plurality of flow velocity zones, and in any two flow velocity zones having different gas flow velocities, a target roughness of a flow velocity zone having a high gas flow velocity is not greater than a target roughness of a flow velocity zone having a low gas flow velocity. The flow channel inside the particle separator can be divided into a first flow velocity area, a second flow velocity area and a third flow velocity area; the flow channel comprises an inlet flow channel, a main flow channel and a clearing flow channel; the first flow velocity region is at least partially coincident with the primary flowpath, the second flow velocity region is at least partially coincident with the inlet flowpath, and the third flow velocity region is at least partially coincident with the scavenge flowpath.
Furthermore, the surface roughness of the main flow channel of the particle separator is Ra0.8-Ra1.6, the surface roughness of the inlet flow channel is Ra1.6-Ra3.2, and the surface roughness of the cleaning flow channel is Ra3.2-Ra6.3.
The exemplary embodiment also provides an aircraft turboshaft engine including the above-described particle separator.
The advantages and positive effects of the particle separator and the aviation turboshaft engine comprising the same are described in detail in the corresponding processing method of the particle separator, and are not repeated herein.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, and the features discussed in connection with the embodiments are interchangeable, if possible. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (9)
1. A method of processing a particle separator, comprising:
providing a particle separator to be processed;
carrying out pneumatic speed simulation analysis on the inside of a flow channel of the particle separator, and dividing the inside of the flow channel into a plurality of flow velocity areas according to the gas flow velocity;
determining the target roughness of each flow velocity area according to the gas flow velocity of each flow velocity area; in any two flow velocity areas with different gas flow velocities, the target roughness of the flow velocity area with high gas flow velocity is not larger than that of the flow velocity area with low gas flow velocity;
processing the roughness of each flow velocity area of the particle separator into corresponding target roughness;
wherein the target roughness of the flow velocity region is K'; the gas flow velocity of the flow velocity area is u0The target roughness of the flow velocity region and the gas flow velocity of the flow velocity region satisfy the following equation:
wherein, v is 14.75 × 10-6m2And/s is the aerodynamic viscosity coefficient.
2. The method of manufacturing particle separators of claim 1, wherein said performing a pneumatic velocity simulation analysis of the flow passage interior of the particle separator and dividing the flow passage interior into a plurality of flow velocity zones based on gas flow velocity comprises:
carrying out pneumatic speed simulation analysis on the interior of a flow channel of the particle separator to obtain a Mach number distribution result of the interior of the flow channel;
and carrying out region division on the interior of the flow channel according to the Mach number distribution result so as to determine a plurality of flow velocity regions.
3. The method of fabricating particle separators of claim 2, wherein said regionalizing the interior of the flow channel according to the mach number distribution to define a plurality of flow velocity regions comprises:
dividing the part with the equivalent Mach number value in the flow channel into a region to determine a first flow velocity region, a second flow velocity region and a third flow velocity region; wherein the average mach number value of the first flow velocity region is higher than the average mach number value of the second flow velocity region, and the average mach number value of the second flow velocity region is higher than the average mach number value of the third flow velocity region.
4. The method of processing particle separators of claim 3, wherein said processing the roughness of each flow velocity region of the particle separator to a corresponding target roughness comprises:
adjusting the roughness of the first flow velocity area to a first preset range;
adjusting the roughness of the second flow velocity region to a second preset range;
adjusting the roughness of the third flow velocity area to a third preset range;
the maximum value of the first preset range is not more than the minimum value of a second preset range, and the maximum value of the second preset range is not more than the minimum value of a third preset range.
5. The method of processing particle separators of claim 4, wherein the flow channel interior of the particle separator includes an inlet flow channel, a primary flow channel, and a purge flow channel; the first flow velocity region is at least partially coincident with the primary flowpath, the second flow velocity region is at least partially coincident with the inlet flowpath, and the third flow velocity region is at least partially coincident with the scavenge flowpath.
6. The method of processing a particle separator as recited in claim 5, wherein the first predetermined range is from Ra0.8 to Ra1.6, the second predetermined range is from Ra1.6 to Ra3.2, and the third predetermined range is from Ra3.2 to Ra6.3.
7. A particle separator comprising a flow channel, wherein the flow channel is internally divided into a plurality of flow velocity zones, and in any two flow velocity zones having different gas flow velocities, the target roughness of the flow velocity zone having a high gas flow velocity is not greater than the target roughness of the flow velocity zone having a low gas flow velocity, wherein,
the target roughness of the flow velocity region is K'; the gas flow velocity of the flow velocity area is u0The target roughness of the flow velocity region and the gas flow velocity of the flow velocity region satisfy the following equation:
wherein, v is 14.75 × 10-6m2And/s is the aerodynamic viscosity coefficient.
8. The particle separator of claim 7, wherein the flow channel interior is divided into a first flow velocity region, a second flow velocity region, and a third flow velocity region;
the flow channel comprises an inlet flow channel, a main flow channel and a clearing flow channel; the first flow velocity region at least partially coincides with the primary flowpath, the second flow velocity region at least partially coincides with the inlet flowpath, and the third flow velocity region at least partially coincides with the scavenge flowpath;
the surface roughness of the main runner is Ra0.8-Ra1.6, the surface roughness of the inlet runner is Ra1.6-Ra3.2, and the surface roughness of the cleaning runner is Ra3.2-Ra6.3.
9. An aircraft turboshaft engine including a particle separator according to claim 7 or 8.
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| CN107076015A (en) * | 2014-11-04 | 2017-08-18 | 三菱重工业株式会社 | The manufacture method of turbine shroud and turbine shroud |
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| US9416880B2 (en) * | 2013-10-18 | 2016-08-16 | Hamilton Sundstrand Corporation | Rotary metering valve assembly and method of modifying contact surface for reducing gauge wringing |
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|---|---|---|---|---|
| US5426943A (en) * | 1992-12-17 | 1995-06-27 | Asea Brown Boveri Ag | Gas turbine combustion chamber |
| EP1548263A1 (en) * | 2003-10-20 | 2005-06-29 | Nissan Motor Co., Ltd. | Partition plate for intake port, sand core for forming intake port, and cylinder head |
| CN101608563A (en) * | 2008-06-21 | 2009-12-23 | 德国曼商用车辆股份公司 | Be used for from particle separator and method at the exhaust flow separating particles of internal-combustion engine |
| CN107076015A (en) * | 2014-11-04 | 2017-08-18 | 三菱重工业株式会社 | The manufacture method of turbine shroud and turbine shroud |
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