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CN-122016413-A - Ablative gas phase product sampling device for heat-resistant material flat plate model

CN122016413ACN 122016413 ACN122016413 ACN 122016413ACN-122016413-A

Abstract

The invention provides an ablative gas-phase product sampling device for a thermal-protection material flat plate model, and relates to the technical field of aircraft ground assessment tests. The flat plate model is arranged in the tool, the flat plate model is heated by utilizing upstream air flow to heat the flat plate model to ablate and release ablated gas phase products, a cooling water channel is arranged in the tool and can work in a pneumatic thermal environment for a long time, a stop block is connected to the downstream side of the tool and used for limiting the displacement of the flat plate model along the air flow direction, and a sampler is arranged in the stop block and used for collecting the ablated gas phase products released after the flat plate model is heated. The invention can adapt to the severe test environment brought by high-temperature supersonic air flow, realizes the in-situ sampling of the ablated gas phase product under the vacuum condition, and simultaneously, the sampling process and the ablation process are not mutually interfered.

Inventors

  • Jiang Denghao
  • LIU YUXIANG
  • ZHOU KAI
  • CHENG HUANZHE
  • FU JIANZHUANG
  • GAO HE
  • OU DONGBIN

Assignees

  • 中国航天空气动力技术研究院

Dates

Publication Date
20260512
Application Date
20260113

Claims (10)

  1. 1. An ablative vapor phase product sampling device for a flat panel model of a thermal protection material, comprising: The device comprises a tool (1) and a flat model (2), wherein the flat model (2) is arranged in the tool (1), and a cooling water channel is formed in the tool (1); The stop block (3) is connected to the downstream side of the tool (1) along the air flow direction and is used for limiting the displacement of the flat plate model (2) along the air flow direction; the sampler (4) is arranged in the stop block (3) and is used for collecting ablative gas-phase products released after the flat plate model (2) is heated; and heating the flat model (2) by using upstream air flow to heat the flat model so as to ablate, and collecting ablated gas phase products released after the flat model (2) is heated by using a sampler (4) positioned downstream of the air flow.
  2. 2. The ablative gas phase product sampling device for a flat plate model of heat-resistant material according to claim 1, wherein the tool (1) is of a U-shaped structure with an opening at the top, the bottom and one side, and the opening at the top of the tool (1) is provided with an inward stepped inner edge; the flat model (2) is provided with a step-shaped outer edge; The flat plate model (2) is arranged at the opening of the top of the tool (1) along the air flow direction, and the stepped outer edge of the flat plate model (2) is embedded with the stepped inner edge of the tool (1).
  3. 3. The ablative gas phase product sampling device for a flat panel model of heat resistant material of claim 1, further comprising a cover plate (6), the cover plate (6) extending into the tooling (1) and abutting against the backside of the flat panel model (2).
  4. 4. The ablative gas phase product sampling device for the thermal protection material flat plate model according to claim 1, wherein a waist-shaped hole penetrating through the side face of the stop block (3) is formed, and a screw penetrates through the waist-shaped hole to be connected with a screw hole on the side wall of the tool (1) in a matched mode.
  5. 5. The ablative gas phase product sampling device for the thermal protection material flat plate model according to claim 1, wherein a cooling water channel of the tool (1) is arranged inside the side wall of the tool (1) and is adjacent to the upper surface of the tool (1), and a water inlet and a water outlet communicated with the cooling water channel are arranged outside the side wall of the tool (1).
  6. 6. The ablative gas phase product sampling device for the thermal protection material flat plate model according to claim 1, wherein a chamber for installing the sampler (4) is arranged in the stop block (3), the sampler (4) is inserted into the chamber from the bottom of the stop block (3), and a sampling port of the sampler is communicated with the top end of the stop block (3).
  7. 7. The ablative gas phase product sampling device for the thermal protection material flat plate model according to claim 6, wherein a cooling water channel is arranged between the sampler (4) and the chamber of the stop block (3) to form a dividing wall type water cooling structure; the cooling water channel is formed in the stop block (3), a water inlet and a water outlet which are communicated with the cooling water channel are formed in the bottom of the stop block (3), and cooling water enters the cooling water channel from a water inlet at one side of the bottom of the stop block (3), transversely passes through a cavity for installing the sampler (4) and leaves the cooling water channel from a water outlet at the other side of the bottom of the stop block (3).
  8. 8. The ablative gas phase product sampling device for a flat panel model of heat resistant material of claim 6, wherein the chamber is comprised of multiple concentric circular holes of progressively increasing diameter from top to bottom, the sampler (4) is comprised of multiple concentric cylindrical segments of progressively increasing diameter from top to bottom, and the sampler (4) is mounted in the chamber from bottom to top.
  9. 9. The ablative gas phase product sampling device for a flat panel model of heat resistant material according to claim 6, wherein the bottom of the sampler (4) is pressed with a press block (5), and the press block (5) is detachably connected with the bottom of the stopper (3).
  10. 10. The ablative gas phase product sampling device for a flat panel model of heat resistant material according to claim 1, wherein the sampler (4) is made of a metal with high thermal conductivity, micropores are arranged at the top of the sampler (4), and sampling channels are provided inside the sampler (4) passing through the samplers.

Description

Ablative gas phase product sampling device for heat-resistant material flat plate model Technical Field The invention relates to the technical field of aircraft ground assessment tests, in particular to an ablative gas-phase product sampling device for a heat-resistant material flat plate model. Background The aerodynamic heat ground ablation test based on the arc wind tunnel is a main mode of heat-proof material screening or heat-proof scheme checking. Compared with laboratory-scale small-sized tests such as a thermal weight test and a tube furnace test, the electric arc wind tunnel test can provide a more real aerodynamic thermal environment, and the obtained test data has more application value. However, due to the complex aerodynamic thermal environment of the arc wind tunnel, mass spectrometry, chromatography, spectrum and other substance analysis methods which are relatively common in a laboratory cannot be simply coupled in an arc wind tunnel test system, and an adaptive design needs to be carried out on related devices. For mass spectrometry, chromatography, and other contact-type substance analysis methods, the ablated gaseous product needs to be collected and transported into a detection instrument. In order to achieve the purpose, the sampling device should have the capability of working for a long time under the aerodynamic thermodynamic load, the sampling device should not influence the flow field and the ablation process of the heat-resistant material, the sampling device should realize sampling in dust-containing, high-temperature and high-speed airflow under the vacuum condition, and ensure the validity of the sample and the like. In a word, for mass spectrometry and chromatographic analysis, after sampling of gaseous ablation products is realized, the components and the content of the gaseous products are analyzed, so that the ablation behavior and mechanism of the heat-proof material can be recognized more deeply, and support is provided for the research and development of the heat-proof material. In view of the above, the invention provides an in-situ sampling device for an ablated gas phase product of a thermal protection material flat plate model, which can work for a long time in an arc wind tunnel aerodynamic heating environment and does not influence a supersonic flow field and a model ablation process. Disclosure of Invention The invention aims to provide an ablative gas-phase product sampling device for a thermal-protection material flat plate model, which can adapt to severe test environments caused by high-temperature supersonic airflow, realize in-situ sampling of ablative gas under vacuum conditions, and simultaneously, the sampling process and the ablative process are not mutually interfered. The invention provides an ablative gas phase product sampling device for a thermal protection material flat plate model, which comprises a tool and a flat plate model, wherein the flat plate model is installed in the tool, a cooling water channel is formed in the tool, a stop block is connected to the downstream side of the tool in the air flow direction and used for limiting the displacement of the flat plate model in the air flow direction, a sampler is installed in the stop block and used for collecting ablative gas phase products released after the flat plate model is heated, the flat plate model is heated by utilizing upstream air flow to heat and ablate, and the ablative gas phase products released after the flat plate model is heated by the sampler positioned downstream of the air flow are collected. Preferably, the tool is of a U-shaped structure with an opening at the top, the bottom and one side, the opening at the top of the tool is provided with an inward stepped inner edge, the flat model is provided with a stepped outer edge, the flat model is arranged at the opening at the top of the tool along the air flow direction, and the stepped outer edge of the flat model is embedded with the stepped inner edge of the tool. Preferably, the fixture further comprises a cover plate, wherein the cover plate stretches into the fixture and abuts against the back side of the flat plate model. Preferably, the side of dog is provided with the waist hole that runs through it, and the screw passes waist hole with screw cooperation is connected on the frock lateral wall. Preferably, the cooling water channel of the tool is arranged inside the side wall of the tool and is adjacent to the upper surface of the tool, and the side wall of the tool is provided with a water inlet and a water outlet communicated with the cooling water channel. Preferably, a cavity for installing the sampler is arranged in the stop block, the sampler is inserted into the cavity from the bottom of the stop block, and a sampling port of the sampler is communicated with the top end of the stop block. Preferably, a cooling water channel is arranged between the sampler and the chamber of the baffle block to form a wall-separa