Design of Thermal Management System for Airborne Electronic LRU System
This project report is an effort towards learning the Design of thermal managment system of an electronic LRU for an airborne platform. L.R.U (Line Replacing Unit) is a component of an airborne system that is designed to be replaced quickly at an operating location. LRUs improve maintenance ope
2025-06-28 16:31:58 - Adil Khan
Design of Thermal Management System for Airborne Electronic LRU System
Project Area of Specialization Mechanical EngineeringProject SummaryThis project report is an effort towards learning the Design of thermal managment system of an electronic LRU for an airborne platform. L.R.U (Line Replacing Unit) is a component of an airborne system that is designed to be replaced quickly at an operating location. LRUs improve maintenance operations. It can be replaced, can be stocked and restoring the system to service, while the failed (unserviceable) L.R.U is undergoing maintenance. A lot of research on LRU is ongoing. There are three main steps for this project. First is the Thermal analysis of existing design of an electronic LRU. Second is the design of heat exchanger for the enhancement of LRU. Prototype tesing and Last one is the design validation of LRU for the conformance of analytical parameters for the modified design.
Project ObjectivesMain objectives for carrying out this research were:
- It is required for the Development of Heat exchanger for an indigenously developed LRU.
- Thermal Analysis required for the Heat Exchanger mechanism for heat transfer under failed mode.
- Improvements can be made.
- Thermal Simulations of LRU for conformance of Analytical Parameters
A line-replaceable unit (LRU), is a modular component of an airplane, ship or spacecraft that is designed to be replaced quickly at an operating location. The different lines (distances) are essential for logistics planning and operation. An LRU is usually a sealed unit such as a radio or other auxiliary equipment. LRUs are typically assigned logistics control numbers (LCNs) or work unit codes (WUCs) to manage logistics operations. LRUs can improve maintenance operations, because they can be stocked and replaced quickly from distributed nearby on-site inventories (sometimes mobile storage), restoring the mobile systems to service, while the failed (unserviceable) LRU is undergoing complicated repair and overhaul actions in other support locations (lines). Because of their modularity, LRUs also can contribute reducing system costs and increase quality, by centralizing development across different models of vehicle.
Benefits of the ProjectThis research is taking on the qualification of LRU because before placement of LRU in any airborne system. LRU is the backbone of any airborne system as it control the electronic section. When LRU is operating it takes a lot of electric power which cause the sudden rise in the temperature of electronic body. If we don’t use any heat transfer system then the electronic body will burn away. As the optimum temperature for the electronic system to work is 40o C. For this purpose Heat exchanfer is used in this system for heat removal. The airborne systems flying at very high velocity, then aerothermal layer formation occurs. The analysis going through the Ansys simulation is the aerothermal analysis.
Technical Details of Final DeliverableAs this project is for the Heat Exchanger Design for an LRU, The analysis goes through four major steps. Which are following:
- Large System Analysis of Current LRU
- Sub-System Analysis of Current LRU
- Design of Heat Exchanger
- Protoype
- lab Testing
- Design Improvement
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Total in (Rs) | 79800 | |||
| Induction fans | Equipment | 2 | 4000 | 8000 |
| Draft Fans | Equipment | 2 | 9500 | 19000 |
| Aluminum Metal Sheet 6061 | Equipment | 8 | 1000 | 8000 |
| Heat Exchanger Fins | Equipment | 4 | 2500 | 10000 |
| Metal Working | Equipment | 1 | 8000 | 8000 |
| Heat Treatment T6, T4 class | Equipment | 1 | 5000 | 5000 |
| Surface Treatment | Equipment | 1 | 5000 | 5000 |
| Thermal Sensor | Equipment | 4 | 200 | 800 |
| Electronics | Miscellaneous | 1 | 4000 | 4000 |
| 220 Power Supply | Equipment | 1 | 6000 | 6000 |
| Over Head | Miscellaneous | 1 | 6000 | 6000 |