Why do aircraft engines use integral blades? They are the key to flying!
The aircraft engine is the “heart” of the aircraft and is also known as the “crown jewel of industry”. Its manufacturing integrates many cutting-edge technologies in modern industry, involving materials, mechanical processing, thermodynamics and other fields. As countries have higher and higher requirements for engine performance, new structures, new technologies and new processes in research and development and application are still constantly challenging the peak of modern industry. One of the important factors in improving the thrust-to-weight ratio of aircraft engines is the integral blade disk. Advantages of blisks Before the emergence of the integral blade disk, the rotor blades of the engine needed to be connected to the wheel […]
The influence of hot corrosion on the fatigue performance of hot end component materials
At present, there is a clear understanding of the influence and mechanism of hot corrosion on the fatigue performance of turbine disk alloys. However, similar to high-temperature alloys for turbine blades, existing research results are mainly based on pre hot corrosion of turbine disk alloys and fatigue tests, which cannot reflect the interaction between hot corrosion and mechanical loads in real time. Therefore, further research is needed to investigate the fatigue failure mechanism and law of turbine disk alloys under the coupling effect of hot corrosion and fatigue loads. In addition, for turbine disks, in order to improve the level of damage tolerance design and meet the durability, reliability, and […]
The whole machine is stunning! Graphic animation takes you to understand the four major violent testing experiments of aircraft engines
An aircraft engine is a highly complex and precise thermodynamic machine. As the heart of an aircraft, it is not only the driving force for flight, but also an important driving force for the development of the aviation industry. Every important change in human aviation history is closely related to the technological progress of aircraft engines. Aircraft engines are known as the “flower of industry” and are high-tech products that are capital and technology intensive. This article will take you through the four essential violent testing tests that must be conducted for the entire aircraft engine. First: Swallowing test When an airplane flies on rainy days, the engine will ingest […]
Turbine Basics – Turbine and Blade Cooling Technology
Axial flow turbine structure A turbine is a rotary power machine that converts the enthalpy of a working fluid into mechanical energy. It is one of the main components of aircraft engines, gas turbines, and steam turbines. The energy conversion between turbines and compressors and airflow is opposite in procedure. The compressor consumes mechanical energy when it is running, and the airflow gains mechanical energy when it flows through the compressor, and the pressure and enthalpy increase. When the turbine is running, shaft work is output from the turbine shaft. Part of the shaft work is used to overcome the friction on the bearings and drive the accessories, and the […]
Analysis of the development history, market status and development trend of turbine blades
Development History and Trends of Turbine Blades Turbine blades are divided into two categories: turbine guide blades and turbine working blades. The main function of turbine guide vanes is to adjust the flow direction of the exhaust gas from the combustion chamber. The material operating temperature can reach up to over 1,100°C, and the stress borne by turbine guide vanes is generally less than 70MPa. This component is often scrapped due to distortion caused by large thermal stress, thermal fatigue cracks caused by sudden temperature changes, and burns caused by local excessive temperatures. The turbine blades are located in the turbine engine with the highest temperature, the most complex stress […]
Advanced Turbomachinery Blade Design Methods
CAESES is a flexible and powerful platform for the design of turbomachinery blades, including advanced endwall optimization methods. All parameterized blade models can be closely linked to meshing and simulation tools to run automated CFD simulation analysis and optimization design. Application cases include turbochargers, steam turbines, fans and pumps – including axial flow, centrifugal or mixed flow. Internationally renowned companies such as Siemens, Toyota, MTU, KSB, Spencer Turbine and IHI are using CAESES to design turbomachinery components. Why CAESES? Blade design – efficient and flexible The blade model in CAESES can be created quickly manually or automatically. Create single blades or separate blade models, using existing templates or customizing them, […]
Optimization of gas turbine blade heat treatment: application of thermal diffusion technology and high temperature shielding mud
As a modern key power mechanical equipment, gas turbine efficiency improvement is crucial to energy utilization and industrial development. In order to enhance the performance of gas turbines, researchers have taken various measures in the design and material selection of turbine blades. By optimizing blade design, selecting new high-temperature resistant materials, and coating the blade surface with high-temperature protective coatings (such as NiCoCrAlY coating), the working efficiency of gas turbines can be significantly improved. These coatings are favored by materials scientists because they are easy to implement, simple in principle, and effective. However, gas turbine blades that operate for a long time in high-temperature environments face the problem of interdiffusion […]
Turbine: Research progress on cooling structure of air-cooled turbine blades for aircraft engines
An efficient cooling structure is the key to avoiding thermal damage to air-cooled turbine blades, which directly affects blade cooling efficiency and aircraft engine stability. However, the efficient cooling structure leads to a more complex coherent effect between the mainstream and cold air flow, and the development of efficient cooling structures has always been constrained by processing technology. This article divides turbine blades into leading edge, middle chord, and trailing edge regions from the perspective of controlling cold air flow. It focuses on the research progress of cooling structures for air-cooled turbine blades in the past decade and the aerodynamic heat transfer characteristics under turbine rotation, including vortex impingement cooling, […]
Recent Progress in Reliability Analysis of Aeroengine Rotor Systems
As a key rotating component of an aero-engine, the rotor system works in a harsh environment of high temperature, high pressure and high speed for a long time, and needs to meet a series of demanding and contradictory indicators such as long life, light weight and high reliability. Under the influence of multiple random factors such as multi-field loads, material properties and model parameters, the stress-strain and fatigue life responses of the rotor system often show large dispersion. Its refined failure assessment and reliability analysis have become key technologies in the development of advanced aero-engines. This paper first discusses the current commonly used reliability analysis methods and their modeling ideas, […]
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