بررسی میدانی عملکرد پوشش آکوستیکی پتویی به منظور کاهش صدای خطوط لوله متصل به توربور اکسپندر

Turboexpanders are key components in the gas, petrochemical and power generation industries, which use the expansion of high-pressure gases to generate mechanical energy and reduce temperature for separation processes simultaneously. However, the passage of high-pressure and high-velocity flows through the pipes connected to the turboexpander, particularly in the inlet and outlet areas, generates significant aerodynamic noise. In addition to causing noise pollution in the workplace, this noise can lead to mechanical fatigue of components, increased energy losses and environmental dissatisfaction. Therefore, controlling and reducing noise in this equipment is of particular importance from safety, operational and environmental aspects. One of the effective and industrial methods for controlling noise in gas lines is the use of acoustic blanket coatings. These coatings reduce noise in different frequency ranges by absorbing and attenuating sound waves without the need to change the geometry or flow conditions. The main advantage of this method over in-line silencers is that it does not affect the fluid flow characteristics and is easy to install and maintain in industrial environments. In this paper, the performance of acoustic blanket coatings in reducing the noise of pipelines and turboexpander bodies is evaluated experimentally under real operating conditions. Field measurements of sound pressure levels were made at several key points before and after the coating was installed, and the data were analyzed by frequency spectrum analysis. The results showed that the use of acoustic blanket coatings significantly reduced the sound pressure level by about 15 to 25 dB in the dominant frequency ranges. These results demonstrate that acoustic blanket coatings, as a simple, low-cost, and field-installable solution, can be very effective in reducing noise pollution of gas lines connected to turboexpanders without adversely affecting the hydrodynamic performance of the system. The findings of this research can be the basis for designing and selecting suitable acoustic coatings for similar applications in industries.