An isokinetic sampling tube, sampling method and fuel oil concentration measurement system
A sampling tube, isodynamic technology, applied in the field of analysis of gas components in aero-engine combustors, can solve problems such as flow field interference, strength problems, interference, etc., and achieve accurate measurement results
Active Publication Date: 2020-09-22
BEIHANG UNIV
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Problems solved by technology
[0008] (2) Interference to the flow field: The minimum internal diameter of the sampling probe head of the existing isokinetic sampling tube is 4mm, and this cross-sectional area will have a large impact on the flow field for the aero-engine combustion chamber under high-speed flow If the existing isokinetic sampling tube is simply scaled to reduce the cross-sectional area of the probe head, it will cause strength problems due to the impact of high-speed incoming flow;
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[0075] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is illustrative only, and in no way restricts the disclosure, its application or uses. The present disclosure can be implemented in many different forms and is not limited to the embodiments described here. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that relative arrangements of parts and steps, compositions of materials, numerical expressions and numerical values set forth in these embodiments should be interpreted as illustrative only and not as limiting, unless specifically stated otherwise.
[0076] "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distin...
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The invention relates to an isokinetic sampling tube which is used for sampling a fuel gas in an aero-engine combustion chamber. The isokinetic sampling tube comprises a sampling head, a gas-guide tube, an outer tube, a conical head and a middle layer, wherein a first end of the gas-guide tube is used for installing the sampling head, a second end is connected to a fuel gas collection device, and an area of the gas-guide tube, which is close to the first end, has a bending portion so that the first end and the second end form a set angle; the outer tube sleeves the gas-guide tube; the conical head sleeves one end, close to the gas-guide tube, of the sampling head, and is detachably connected to the outer tube; and the middle layer is arranged between the gas-guide tube and the outer tube and can achieve a support effect and a heating effect on the gas-guide tube. By using the isokinetic sampling tube of the invention, fuel concentration in the aero-engine combustion chamber can be conveniently and accurately measured.
Description
technical field [0001] The disclosure belongs to the field of analysis of gas components in an aero-engine combustor, and specifically relates to an isokinetic sampling tube according to the preamble of claim 1, a sampling method according to the preamble of claim 9, and a method according to the preamble of claim 9. 11 The fuel concentration measurement system described in the preamble. Background technique [0002] Measuring the fuel concentration distribution in the combustion chamber of an aero-engine is of great significance for further analyzing the combustion performance. At present, there are two main methods for determining the concentration distribution of fuel oil, spectrometry and sampling. [0003] There are two main problems in determining the concentration distribution of fuel oil by optical measurement. First, it is difficult to obtain the concentration distribution of gas-liquid two phases at the same time, usually only the concentration of gas phase or liq...
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IPC IPC(8): G01N1/24G01N25/40
CPCG01N1/2247G01N25/40
Inventor 刘玉英朱鸿宇刘广海谢奕
Owner BEIHANG UNIV