CN-122006925-A - Multiphase flow particle spray nozzle structure

CN122006925ACN 122006925 ACN122006925 ACN 122006925ACN-122006925-A

Abstract

A multiphase flow particle spray nozzle structure belongs to the technical field of multiphase flow spray structures. The invention comprises an outer tube, an inner tube, a split-flow box, a isolating ring, an injection box and an air injection tube array, wherein the outer tube and the inner tube are coaxially connected, the inner tube is arranged inside the split-flow box, the outer tube is arranged outside the split-flow box, at least one air injection inlet tube is arranged at the lower part of the split-flow box, the split-flow box is connected with the injection box through the isolating ring, the injection box is provided with an inner tube injection hole and a plurality of air injection tube outlets, the inner tube injection hole is connected with the inner tube, the isolating ring is provided with a plurality of air injection tube inlets, the air injection tube array comprises a plurality of air injection tubes, and two ends of each air injection tube are respectively connected with the corresponding air injection tube inlets and air injection tube outlets. The problem that the quality of a flow field of a wind tunnel test is affected due to the accumulation phenomenon of solid particles such as ice crystals, sand dust and the like in the injection process is solved, and particle agglomeration caused by early mixing in a spray head is avoided.

Inventors

REN ZHAOKUN
ZHANG YUE
MA ZHANYUAN
QIN WANGSHU
LI DUCHENG
SHI XIAOZHE
GUAN ZHIDA

Assignees

中国航空工业集团公司哈尔滨空气动力研究所

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. The multiphase flow particle spray nozzle structure is characterized by comprising an outer pipe (1), an inner pipe (2), a split flow box (3), a separation ring (4), a spray box (5) and an air spray pipe array (6), wherein the outer pipe (1) and the inner pipe (2) are coaxially connected, the inner pipe (2) is arranged inside the split flow box (3), the outer pipe (1) is arranged outside the split flow box (3), at least one air spray inlet pipe (32) is arranged at the lower part of the split flow box (3), the split flow box (3) is connected with the spray box (5) through the separation ring (4), the spray box (5) is provided with an inner pipe spray hole (53) and a plurality of air spray pipe outlets (52), the inner pipe spray hole (53) is connected with the inner pipe (2), the separation ring (4) is provided with a plurality of air spray pipe inlets (43), and the air spray pipe array (6) comprises a plurality of air spray pipes, and two ends of each air spray pipe are respectively connected with the corresponding air spray pipe inlets (43) and the air spray pipe outlets (52).
2. The multiphase flow particle spray nozzle structure of claim 1, wherein a plurality of positioning pins (31) are arranged on the surface of the diversion box (3), first positioning holes (41) matched with the positioning pins (31) are arranged on the surface of the isolation ring (4), second positioning holes (51) matched with the positioning pins (31) are arranged on the surface of the spray box (5), and the positioning pins (31) are matched with the first positioning holes (41) and the second positioning holes (51) to realize positioning connection.
3. A multiphase flow particle spray nozzle structure as claimed in claim 1, characterized in that the isolating ring (4) is further provided with an outer pipe and inner pipe connecting hole (42), and the outer pipe (1) and the inner pipe (2) are connected with a diversion box (3) through the outer pipe and inner pipe connecting hole (42).
4. A multiphase flow particle spray nozzle structure as claimed in claim 3, wherein the surface of the inner pipe connecting hole (42) of the outer pipe is provided with threads, and the outer pipe (1) and the inner pipe (2) are connected with the diversion box (3) through threads.
5. A multiphase flow particle spray head structure as recited in claim 1, wherein the number and/or inclination angle of air injection tubes in said air injection tube array (6) is configurable to be different numbers/angles.
6. A multiphase flow particle spray nozzle structure as recited in claim 1 wherein said air injection inlet tube (32) is a plurality in number.
7. A multiphase flow particle spray nozzle structure as claimed in claim 1, characterized in that an inner pipe spray hole (53) of the spray box (5) is connected with the inner pipe (2) through threads.
8. The multiphase flow particle spray nozzle structure according to claim 1 is characterized in that piezoelectric ceramics are arranged on the surface of the outer pipe (1) and/or the inner pipe (2).
9. The multiphase flow particle spray nozzle structure according to claim 1, wherein one end surface of the outer pipe (1) is provided with threads for being connected with the diversion box (3).
10. A multiphase flow particle spray nozzle structure as recited in any one of claims 1-9, wherein the multiphase flow particles include ice crystal particles or sand dust particles.

Description

Multiphase flow particle spray nozzle structure Technical Field The invention relates to a multiphase flow particle spray nozzle structure, and belongs to the technical field of multiphase flow spray structures. Background The wind tunnel test is key ground test equipment in the development process of vehicles such as aircrafts, and when the environment test is carried out, special working condition tests such as sand dust test and ice crystal particle test are required to be carried out. In these related experiments, it was necessary to perform injection of ice crystals and dust particles, and thus injection of a gas-solid two-phase flow was necessary using an injection structure. However, the uniformity of particle distribution is an unavoidable issue in conducting multiphase flow injection. Particularly, when an outflow field with a contraction function acts, multiphase flow particles can also shrink and gather under the action of air drag force, so that the particle distribution is uneven, and the quality of a wind tunnel test flow field and the accuracy of test data are seriously affected. The current multiphase flow spray head mainly uses liquid water drops as a main experimental medium, is suitable for drop spraying scenes such as raindrops and atomization, and is not suitable for solid multiphase flow particles such as ice crystals and sand dust. Therefore, it is desirable to provide a multiphase flow particle spray nozzle structure to solve the above technical problems. Disclosure of Invention The present invention has been developed to solve the problem of accumulation of solid particles such as ice crystals, sand dust, etc. during injection, thereby affecting the quality of the flow field of wind tunnel test, and a brief summary of the present invention is provided below to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. The technical scheme of the invention is as follows: The utility model provides a multiphase flow granule sprays shower nozzle structure, including outer tube, inner tube, reposition of redundant personnel box, isolating ring, jet box and air injection pipe array, outer tube and inner tube coaxial coupling, the inner tube sets up inside the reposition of redundant personnel box, the outer tube sets up in reposition of redundant personnel box outside, reposition of redundant personnel box lower part is provided with at least one air injection inlet pipe, the reposition of redundant personnel box passes through the isolating ring and is connected with jet box, jet box is provided with inner tube jet hole and a plurality of air injection pipe export, inner tube jet hole and inner tube connection, be provided with a plurality of air injection pipe import on the isolating ring, air injection pipe array, including a plurality of air injection pipes, every air injection pipe's both ends respectively with corresponding air injection pipe import and air injection pipe exit linkage. Preferably, the surface of the shunt box is provided with a plurality of positioning pins, the surface of the isolating ring is provided with a first positioning hole matched with the positioning pins, the surface of the injection box is provided with a second positioning hole matched with the positioning pins, and the positioning pins are matched with the first positioning holes and the second positioning holes to realize positioning connection. Preferably, the isolating ring is further provided with an outer pipe and inner pipe connecting hole, and the outer pipe and the inner pipe are connected with the shunt box through the outer pipe and inner pipe connecting hole. Preferably, the surface of the connecting hole of the inner pipe of the outer pipe is provided with threads, and the outer pipe and the inner pipe are connected with the shunt box through threads. Preferably, the number and/or the inclination angle of the air injection pipes in the air injection pipe array are adjustable. Preferably, the number and/or size of the air injection inlet pipes is adjustable. Preferably, the inner pipe jet hole of the jet box is connected with the inner pipe through threads. Preferably, piezoelectric ceramics are arranged on the surface of the outer tube and/or the inner tube. Preferably, one end surface of the outer tube is threaded for connection with the manifold. Preferably, the multiphase flow particles comprise ice crystal particles or sand particles. The invention has the following beneficial effects: 1. According to the invention, through the cooperation of the flow dividing box, the isolating ring and the jet box, two independent areas of particle conveying and high-pressure air flow are formed inside the spray head, namely, the inner pipe and the outer pipe convey solid multiphase