Tapered Pulse Filter Reduces Pressure Drop
Solution Overview
Problem
Existing inlet air filtration systems for gas turbine engines experience increased pressure drops due to recirculation zones formed by airflow stagnation, which reduces filtration efficiency and overall system performance.
Innovation Solution
Incorporating a tapered section into pulse filters with a conical and cylindrical design, along with a pleated filter media, to minimize recirculation zones and enhance airflow interaction, thereby reducing pressure losses and improving dust holding capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pulse filter design with conical and cylindrical sections is used, then the filtration system can remove contaminants effectively, but the recirculation zone causes increased pressure drop and reduced system efficiency
Solution Approach 1:
The pulse filter is divided into three distinct sections: conical section, transitional section, and tapered section. Each section serves a specific function in guiding airflow and minimizing recirculation zones, thereby reducing pressure drop while maintaining filtration efficiency.
Solution Approach 2:
The addition of the tapered section creates a three-dimensional airflow path that eliminates stagnant recirculation zones. The tapered geometry directs airflow in a more linear path through the filter media, reducing turbulence and pressure losses associated with conventional two-section designs.
2Device complexity
If the inlet air takes multiple turns to reach the pulse filters, then the filtration system can be compactly arranged, but recirculation zones form causing airflow stagnation and increased pressure losses
Solution Approach 1:
The conical and tapered sections use curved geometries to guide airflow smoothly through the filter assembly. These curved surfaces redirect airflow without creating sharp stagnation zones, maintaining compact arrangement while improving flow efficiency and reducing pressure losses.
3Reliability
If a larger filter area is used to improve dust holding capacity, then the filtration efficiency increases, but the pressure drop across the filters increases
Solution Approach 1:
The tapered section creates localized variations in airflow velocity and pressure distribution across the filter media. This optimized local flow pattern enhances dust particle capture efficiency while minimizing overall pressure drop, allowing larger filter areas to be used effectively without proportionally increasing energy losses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tapered section design reduces pressure drops by up to 20% across the filters, enhancing filtration efficiency and power plant output while maintaining effective contaminant removal.
Implementation Method 1
The ambient air entering the weather hood may take a number of turns to reach and pass through the pulse filters. A recirculation zone therefore may be produced about the entrance to the pulse filters. Such a recirculation zone may cause the incoming airflow to stagnate and increase the pressure losses across the filters.
Implementation Method 2
Such a recirculation zone may cause the incoming airflow to stagnate and increase the pressure losses across the filters. Overall system efficiency and power output may be a direct function of the inlet pressure drop caused herein.
Data Source
AI summary
The present application provides an inlet air pulse filtration system. The inlet air pulse filtration system may include an inlet filter house and a number of pulse filters positioned therein. One or more of the pulse filters may include a conical section, a transitional section, and a tapered section.