Air Inlet Duct for Gas Turbines and The Function of VHE Assembly Phase

24/11/2025

In the Gas Turbine system, the Air Inlet Duct serves as a crucial component that directs a consistent intake air flow into the compression chamber. Even minor deviations in its structure or installation position can significantly impact pressure, performance, and operational reliability. Consequently, the manufacturing process, particularly the pre-assembly phase at VHE, is vital for error control, minimizing structural deformation, and ensuring proper installation of the equipment upon arrival at the construction site.

The Function of Air Inlet Duct in Gas Turbine System

The Air Inlet Duct is commonly known as the “lungs” of a gas turbine, as the flow of intake air directly influences essential operating parameters.

Gas Turbine

A well-designed and efficiently operated Air Inlet Duct system offers numerous essential advantages. It aids in maintaining stable pressure at the turbine inlet, which significantly minimizes aerodynamic losses and undesirable swirl effects. Additionally, this structure contributes to the reduction of noise and vibration during operation, while also serving to protect the turbine equipment from detrimental environmental factors such as dirt, moisture, and corrosive salts.

Conversely, even a minor defect in design or manufacturing—such as an air leak, uneven flow distribution, or excessive turbulence—can result in pressure imbalance, leading to a considerable loss of power and heightened fuel consumption.

Why is pre-assembly necessary?

air inlet duct 1

Conducting a complete or partial Pre-assembly at the factory is an essential quality control measure prior to the shipment and delivery of the Air Inlet Duct to the job site.

Ensuring Precision in Real Assembly

The Air Inlet Duct is a substantial structure, typically made up of numerous interconnected modules. In a construction site setting, the working environment is intricate, and even minor deviations of just a few millimeters can result in the pipe sections failing to align properly. This misalignment can lead to air leaks or gaps, which in turn increase back pressure and diminish overall efficiency.

Consequently, testing at the factory ensures a thorough examination of the connections between the modules. This procedure allows for a quicker, more precise, and safer installation process at the construction site.

welding inspection 1

Deformation and Structural Integrity Assessment

When tested, the Air Inlet Duct will be subjected to near-real mechanical conditions, enabling engineers to quickly identify and rectify potential deformations resulting from the machining process, including shrinkage after welding, thermal stress, or deviations in the center of gravity. Identifying and addressing these structural issues directly at the factory is crucial, as it helps reduce the risk associated with installation on site, where operational conditions are constrained and the cost of corrections is significantly elevated.

Overall Aesthetic and Finish Quality Evaluation

Alongside technical factors, test assembly represents the final phase for assessing the appearance and surface finish of the product prior to painting or packaging for export.

This is a crucial step that showcases professionalism and rigorous quality control in the heavy industrial mechanical manufacturing process, guaranteeing that the product adheres to aesthetic standards and offers optimal surface protection.

air inlet duct 2

Uses of Air Inlet Duct

The Air Inlet Duct is a crucial component that finds extensive application in various significant energy sectors. It is utilized in Gas Power Plants, within Industrial Gas Turbine Systems for rapid or backup power generation, and in industrial power stations that support industrial zones, petrochemical refineries, or integrated energy complexes.

Industrial Waste

In every application, the Air Inlet Duct serves the essential purpose of stabilizing the inlet air flow and pressure to enhance the compression and combustion processes. Furthermore, it is responsible for safeguarding costly turbine equipment from contaminants and severe environmental conditions, while also significantly minimizing noise, thus optimizing performance and prolonging the operational lifespan of the entire power generation system.

Conclude

The production of the Air Inlet Duct demands not only precise mechanical skills but also adherence to international technical standards and rigorous quality control procedures. For Viet Han Engineering, the trial installation phase is a crucial and determining step, aiding in ensuring uniformity, reducing structural deviations, and significantly expediting the installation process at the construction site.

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In the realm of power projects that demand high performance and operational reliability, the effective production of Air Inlet Duct in accordance with international technical standards stands out as a crucial element that distinctly showcases the enterprise’s capabilities in heavy industrial mechanical manufacturing.

Discover additional types of Inlet Duct HERE

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