GB/T 45623-2025 in English
VALIDReciprocating aircraft engines—Containment test method for turbocharger rotors
- Issued on:2025-05-30
- Implemented on:2025-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
| Standard No: | GB/T 45623-2025 |
| Document status: | VALID |
| Title in English: | Reciprocating aircraft engines—Containment test method for turbocharger rotors |
| Title in Chinese: | 航空活塞式发动机 涡轮增压器转子包容试验方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-12-01 |
| ICS Classification: | 49.050-Aerospace engines and propulsion systems |
| Chinese Classification: | V30-Engine |
| Professional Classification: | GB-National Standard |
| Related Topics: | supercharger
Piston Turbocharger Rotary engine testing |
《GB/T 45623-2025航空活塞式发动机 涡轮增压器转子包容试验方法》由TC435（全国航空器标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Core Value and Technical Background of the Standard
This standard proposes a systematic verification scheme for the safety of aviation piston engine turbochargers under extreme operating conditions. With the increase in the power density of general aviation aircraft, the risk of turbocharger rotor rupture has become a key control point for airworthiness certification. The 17 piston engine non-contained failure accidents that occurred worldwide between 2015 and 2024 directly promoted the formulation of this standard.
Test principles and technological innovation
| Technical elements | Traditional methods | Innovation of this standard |
|---|---|---|
| Speed control | Mechanical overspeed protection | Dynamic adjustment of gas flow |
| Weakened standard | No quantitative requirements | Fragments ≥1/3 rotor mass |
| Temperature compensation | Normal temperature test | Not lower than the maximum working temperature |
Key test parameter control
Take the AE300 turbocharger equipped on the DA-42NG aircraft as an example, the experimental parameter settings must meet the following requirements:
- Minimum rupture speed: Design maximum speed × 1.15 safety factor
- Gas temperature≥850℃ (corresponding to the maximum EGT of this model)
- Lubricating oil pressure is controlled within the range of 350-450kPa
Solutions to implementation difficulties
Rotor weakening balancing technology: Determine the optimal slot position through finite element analysis, and achieve controllable rupture while ensuring dynamic balance ≤0.5g·mm. A certain model test shows that the 45° skew slot solution can reduce the rupture speed dispersion from ±8% to ±3%.
Airworthiness compliance verification
The test report shall include high-speed camera frame synchronization data (≥10000fps), shell strain distribution diagram and debris trajectory analysis. According to the requirements of CCAR-33, the containment failure criteria shall meet the following requirements at the same time:
- Shell penetration depth <50% of wall thickness
- Splashing debris does not exceed the 1.5m safety radius
Industry application recommendations
It is recommended that manufacturers establish a rotor-shell matching database, which includes containment threshold data for different material combinations (such as Inconel 718 rotor with Ti-6Al-4V shell). For superchargers with power >300kW, the design of a secondary containment liner should be considered.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 45734-2025 in English
Vibration test method for reciprocating aircraft engines
2025-05-30
