Passive engine combustion chamber thermal management system

Abstract

The utility model belongs to the technical field of engine health management, disclose a kind of passive engine combustion chamber thermal management system, including engine combustion chamber module, the pulsating heat pipe module being set around engine combustion chamber module and temperature alarm module being set on pulsating heat pipe module;The pulsating heat pipe module is used to absorb the large amount of heat that engine combustion chamber module is caused by failure and gathers;The temperature alarm module is used to send alarm signal when pulsating heat pipe module starts.The passive engine combustion chamber thermal management system designed in the utility model can be used for engine combustion chamber thermal management by directly using high-temperature pulsating heat pipe, can adjust the working medium filling ratio in pulsating heat pipe according to demand to adjust start temperature, fully combines the advantage of pulsating heat pipe, better response engine combustion chamber thermal management demand, and is suitable for the solution of engine combustion chamber real-time health management.

Description

Technical Field

[0001] This utility model relates to the field of engine health management technology, and in particular to a passive engine combustion chamber thermal management system. Background Technology

[0002] Whether the turbine inlet temperature of an aero-engine exceeds the limit is a crucial performance indicator affecting the engine's structural safety and lifespan. Overheating is typically caused by malfunctions during engine operation, such as fuel nozzle atomization issues, uneven fuel-air distribution, nozzle carbon buildup, and damage to components in the combustion system, including the flame tube and transition section. However, due to the high-temperature, high-pressure environment inside the combustion chamber, conventional thermal management systems rely on monitoring changes in the uniformity of the turbine inlet temperature field to pinpoint the location of combustion chamber malfunctions. This method is reactive; by the time an alarm is triggered, the combustion system may already be damaged. Therefore, real-time thermal management of the engine combustion chamber is essential to ensure the healthy operation of the combustion system. The technical challenges in achieving this are therefore of paramount importance. Utility Model Content

[0003] To address the issues of delayed response and lack of prior assessment in the thermal management of engine combustion chambers in existing technologies, this invention proposes a passive engine combustion chamber thermal management system. This system aims to ensure the healthy operation of the combustion system through real-time thermal management of the engine combustion chamber. It combines engine technology with pulsed heat pipe technology.

[0004] This utility model is achieved through the following technical solution: it includes an engine combustion chamber module, a pulsating heat pipe module surrounding the engine combustion chamber module, and a temperature alarm module disposed on the pulsating heat pipe module; the pulsating heat pipe module is used to absorb a large amount of heat accumulated in the engine combustion chamber module due to a malfunction; the temperature alarm module is used to issue an alarm signal when the pulsating heat pipe module is started.

[0005] As a further preferred embodiment, the engine combustion chamber module is horizontally arranged, and from one end to the other, it consists of the engine combustion section, the engine turbine section, and the engine exhaust section in sequence.

[0006] As a further preferred embodiment, the pulsating heat pipe module is arranged around the engine turbine section and has a closed-loop structure.

[0007] As a further preferred embodiment, the pulsating heat pipe module includes a pulsating heat pipe evaporation section surrounding the engine turbine section and a pulsating heat pipe condensation section disposed above the pulsating heat pipe evaporation section and away from the engine turbine section.

[0008] As a further preferred embodiment, the temperature alarm module includes an alarm module temperature measuring point and an alarm module thermocouple disposed on the condensing section of the pulsating heat pipe.

[0009] As a further preferred embodiment, the pulsating heat pipe evaporation section is provided with several segments, all of which surround the engine turbine section, and the pulsating heat pipe condensation section is also provided with several segments that cooperate with the pulsating heat pipe evaporation section.

[0010] As a further preferred embodiment, the start-up temperature of the pulse heat pipe module is higher than the normal operating temperature of the engine combustion chamber module.

[0011] As a further preferred option, the working fluid in the pulsating heat pipe module is a sodium working fluid or a sodium-potassium working fluid.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] The passive engine combustion chamber thermal management system designed in this utility model directly uses high-temperature pulsating heat pipes for engine combustion chamber thermal management. The starting temperature can be flexibly adjusted according to the working fluid charging ratio in the pulsating heat pipes. It fully combines the advantages of pulsating heat pipes to better respond to the thermal management needs of the engine combustion chamber and is suitable for real-time health management solutions for engine combustion chambers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] The image indicates:

[0016] I. Engine Combustion Chamber Module; II. Pulsating Heat Pipe Module; III. Temperature Alarm Module; 1.1 Engine Combustion Section; 1.2 Engine Turbine Section; 1.3 Engine Exhaust Section; 2.1 Pulsating Heat Pipe Condensation Section; 2.2 Pulsating Heat Pipe Evaporation Section; 3.1 Alarm Module Thermocouple; 3.2 Alarm Module Temperature Measurement Point. Detailed Implementation

[0017] The advantages and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.

[0018] like Figure 1 As shown, this utility model provides a passive engine combustion chamber thermal management system, including an engine combustion chamber module I, a pulsating heat pipe module II, and a temperature alarm module III. The pulsating heat pipe module II is arranged around the engine combustion chamber module I and is used to absorb the large amount of heat accumulated in the engine combustion chamber module I due to malfunction, so as to achieve rapid cooling of the external ambient temperature of the engine combustion chamber module I and maintain a certain stability. The temperature alarm module III is connected to the pulsating heat pipe module II and is used to issue an alarm signal when the pulsating heat pipe module II is started, so as to remind the staff to check the working status of the engine combustion chamber module I.

[0019] The engine combustion chamber module I is horizontally arranged, and from one end to the other, it consists of the engine combustion section 1.1, the engine turbine section 1.2, and the engine exhaust section 1.3.

[0020] The pulsed heat pipe module II is arranged around the engine turbine section 1.2. The pulsed heat pipe module II has a closed-loop structure, including a pulsed heat pipe condensation section 2.1 and a pulsed heat pipe evaporation section 2.2. The pulsed heat pipe evaporation section 2.2 surrounds the engine turbine section 1.2, and the pulsed heat pipe condensation section 2.1 is located above the pulsed heat pipe evaporation section 2.2 and away from the engine turbine section 1.2. To increase heat exchange efficiency, the pulsed heat pipe evaporation section 2.2 has several segments, all surrounding the engine turbine section 1.2. Correspondingly, the pulsed heat pipe condensation section 2.1 also has several segments that cooperate with the pulsed heat pipe evaporation section 2.2. Preferably, the starting temperature of the pulsed heat pipe module II is higher than the normal operating temperature of the engine combustion chamber module I. The working fluid in the pulsed heat pipe module II is a sodium working fluid or a sodium-potassium working fluid.

[0021] The temperature alarm module III is installed in the condensing section 2.1 of the pulsating heat pipe module II. The temperature alarm module III includes an alarm module thermocouple 3.1 and an alarm module temperature measuring point 3.2, which is installed on the condensing section 2.1 of the pulsating heat pipe.

[0022] The working principle of a passive engine combustion chamber thermal management system is explained below:

[0023] When the engine is running, fuel and air mix and burn in the generator combustion section 1.1, causing the area between the generator combustion section 1.1 and the engine turbine section 1.2 to be under high temperature and high pressure. When a component in the generator combustion section 1.1 fails, causing a rapid increase in the local temperature of the engine turbine section 1.2 and the engine exhaust section 1.3, the local temperature reaches the start-up temperature of the pulsating heat pipe module II. The liquid sodium working fluid in the evaporation section 2.2 of the pulsating heat pipe absorbs heat and generates bubbles. Under continuous heat input, these bubbles rapidly expand and increase in pressure, pushing the sodium working fluid towards the condensation section 2.2 of the pulsating heat pipe. The sodium working fluid reaches the condensation section 2.1 of the pulsating heat pipe and undergoes condensation and heat exchange through the pipe wall. The sodium bubbles / vapor plugs cool, shrink, or even disappear, causing a pressure drop. The pressure difference and pressure fluctuations between the different sections of the heat pipe allow the sodium working fluid to oscillate back and forth between the hot and cold sections, completing the heat transfer and thus rapidly cooling the engine combustion chamber module I, achieving the purpose of health management for engine combustion chamber module I.

[0024] When the sodium working fluid reaches the condensing section 2.1 of the pulsating heat pipe, the thermocouple 3.1 of the alarm module measures the drastic change in the wall temperature of the condensing section 2.1 of the pulsating heat pipe through the temperature measuring point 3.2 of the alarm module. The temperature alarm module III then starts to alarm, reminding relevant personnel to pay attention to the condition of the engine combustion chamber and take more comprehensive measures to ensure the health of the engine combustion chamber.

[0025] In addition to the above embodiments, the present invention may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A passive engine combustion chamber thermal management system, comprising an engine combustion chamber module, characterized in that: It also includes a pulsating heat pipe module surrounding the engine combustion chamber module and a temperature alarm module mounted on the pulsating heat pipe module; the pulsating heat pipe module is used to absorb the heat accumulated in the engine combustion chamber module due to a malfunction; the temperature alarm module is used to issue an alarm signal when the pulsating heat pipe module is started.

2. The passive engine combustion chamber thermal management system according to claim 1, characterized in that: The engine combustion chamber module is horizontally arranged, and from one end to the other, it consists of the engine combustion section, the engine turbine section, and the engine exhaust section.

3. The passive engine combustion chamber thermal management system according to claim 2, characterized in that: The pulsating heat pipe module is arranged around the engine turbine section and has a closed-loop structure.

4. The passive engine combustion chamber thermal management system according to claim 3, characterized in that: The pulsating heat pipe module includes a pulsating heat pipe evaporation section surrounding the engine turbine section and a pulsating heat pipe condensation section disposed above the pulsating heat pipe evaporation section and away from the engine turbine section.

5. The passive engine combustion chamber thermal management system according to claim 4, characterized in that: The temperature alarm module includes an alarm module temperature measuring point and an alarm module thermocouple set on the condensing section of the pulsating heat pipe.

6. The passive engine combustion chamber thermal management system according to claim 5, characterized in that: The pulsating heat pipe evaporation section is provided in several segments, all of which surround the engine turbine section. The pulsating heat pipe condensation section is also provided in several segments to cooperate with the pulsating heat pipe evaporation section.

7. The passive engine combustion chamber thermal management system according to claim 5, characterized in that: The starting temperature of the pulsed heat pipe module is higher than the normal operating temperature of the engine combustion chamber module.

8. The passive engine combustion chamber thermal management system according to claim 5, characterized in that: The working fluid in the pulsating heat pipe module is a sodium working fluid or a sodium-potassium working fluid.

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