The New Era of Combustion Chamber Manufacturing: How CNC and 3D Printing Reshape Efficient Production
The combustion chamber, the “heart” of aircraft engines and gas turbines, have struggled to overcome issues such as long production cycles (8-12 weeks), low yield rates for complex structures (<70%), and high mold costs (30% of total expenses) for some time. As the global gas turbine market is expected to exceed $30.8 billion by 2025 (Grand View Research), traditional casting methodologies cannot meet demands for light weighting, high precision and rapid iteration. The combustion chamber, the “heart” of aircraft engines and gas turbines, have struggled to overcome issues such as long production cycles (8-12 weeks), low yield rates for complex structures (<70%), and high mold costs (30% of total expenses) […]
A comprehensive comparison of the differences between gas turbines and steam turbines
Turbofan engine Also known as the “turbofan engine”, it is developed from a turbojet engine, with a fan and a low-pressure turbine added to the core engine. The fan rotates to compress the air, and the compressed air is divided into two streams. The outer stream flows in parallel and is directly discharged through the nozzle to generate thrust; the inner stream is the same as an ordinary jet engine, and is discharged from the nozzle after passing through the compressor, combustion chamber and turbine. The ratio of the flow rate of the outer stream to the inner stream is called the bypass ratio or flow ratio. Under the same […]
Beyond the Blades: The Turbine’s Vital Role in Gas Turbine Efficiency
The role of the turbine The high-pressure and high-temperature combustion gas coming out of the combustion chamber expands and decelerates to impact the turbine to do work. This drives the compressor to do work, and drives the accessories to work through the accessory casing transmission. Turbine compresses gas? Who can compress high-temperature and high-pressure gas? The number of compressor blades increases from few to many. The blade angle gradually decreases, and the material also changes. The turbine blades are more than the compressor blades. This is mainly because the gas needs to pass through to do work. The compressor blades and the guide vanes in the compressor are both compression-diffusion. […]
From Air to Power: Understanding the Gas Turbine Engine
Working Principle of Gas Turbine The compressor, driven by the turbine, continuously draws in air from the atmosphere and compresses and increases its pressure. The compressed air enters the combustion chamber, mixes with the injected fuel and burns. After becoming high-temperature combustion gas, it flows into the turbine to expand and do work. After doing work, the pressure of the combustion gas drops to atmospheric pressure and is discharged into the atmosphere. Therefore, the three main parts of a gas turbine are the compressor, the combustion chamber and the turbine. An axial flow compressor has many blades, which are similar in shape to propeller blades, but are divided into “moving […]
Revolutionizing Turbine Blades: The Heart of Modern Aircraft Engines
Turbine Blade Introduction The component with the worst working conditions in the turbine engine is also the most important rotating component. In the hot end components of aircraft engines, the turbine blades are subjected to high-temperature gas erosion and temperature changes during the engine start-up and shutdown cycles, and the rotor blades are subjected to centrifugal force at high speeds. The material is required to have sufficient high-temperature tensile strength, endurance strength, creep strength, as well as good fatigue strength, oxidation resistance, gas corrosion resistance and appropriate plasticity. In addition, long-term organizational stability, good impact strength, castability and low density are also required. The gas inlet temperature of advanced aircraft […]
Graphical introduction to the main components of aircraft engines
Turbine Blades Hot end components, turbine blades belong to the hot end components of aircraft engines. They need to work in a high temperature and high pressure environment and are the most difficult blades to manufacture in turbofan engines. High temperature and high pressure combustion gas expands in the turbine, driving the turbine to rotate at high speed to drive the compressor. The airflow enters the tail nozzle through the turbine outlet, where the pressure decreases and the speed increases, and finally it is discharged from the engine to generate power. The structure and material of turbine blades are constantly upgraded. In the mid-20th century, the second-generation engines were mainly […]
How much do you know about the strength design issues and challenges of aviation gas turbine engines?
The aviation gas turbine engine (hereinafter referred to as the engine) is a rotating mechanical product that integrates high temperature, high speed, high pressure and complex vibration environment. How can a high-speed rotating machine working in such a harsh environment have high reliability, safety, economy, comfort (low noise and low vibration) and long life, while also having excellent structural efficiency? The answer must rely on the strength design technology of the aviation gas turbine engine. Therefore, as a branch of mechanical strength design, engine strength design is a time-consuming and costly system engineering, and its design accuracy requires a large amount of continuously improved design practice and product application as […]
Crack analysis method for integral blade ring of aeroengine
With the continuous improvement of aircraft engine performance, high thrust-to-weight ratio has become an important indicator of advanced aircraft engine performance. Therefore, the development of advanced high structural efficiency and high-performance materials with lightweight overall structure has become the main development trend. The integral blade ring structure using continuous fiber reinforced titanium-based composite materials has significant advantages in weight reduction and can also withstand circumferential loads. It is the development direction of advanced aircraft engine materials. At present, the integral blade ring is mostly made of continuous single silicon carbide long fiber reinforced titanium-based composite materials, which has the advantages of high strength, high operating temperature and good fatigue and […]
Causes, hazards and preventive measures of steam turbine water hammer
1. Concept of Steam Turbine Water Hammer Turbine water hammer, that is, the accident caused by water or cold steam (low-temperature saturated steam) entering the steam turbine, is one of the most dangerous accidents in steam turbine operation. Such accidents occur frequently at home and abroad and will cause serious consequences, so boiler and steam turbine operators are required to pay great attention to them. Once such an accident occurs, it must be handled correctly, quickly and continuously to avoid serious damage to the steam turbine equipment. First of all, the phenomena of steam turbine water hammer are: 2. Hazards of water impact (I) Collision between moving and static parts […]
Japanese 
English 
Arabic 
Moroccan Arabic 
Dutch 
French 
German 
Italian 
Polish 
Portuguese 
Russian 
Spanish 
Turkish 
Azerbaijani 
Indonesian 
Thai 
Korean 
Malay 
Myanmar 
Serbian 
Swedish 
Vietnamese