Suction Diffuser Flow Conditioning with Inward Contours
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Solution Overview
Problem
Current suction diffusers suffer from significant stagnation and recirculation zones, leading to non-uniform fluid flow and high pressure head loss, which negatively impacts pump efficiency.
Innovation Solution
A suction diffuser with a flow conditioning arrangement featuring inwardly contoured surfaces, such as conical, pyramidal, or helical designs, that direct incoming fluid towards the outlet, eliminating recirculation and stagnation zones and promoting a uniform flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional suction diffuser body with a simple interior cavity and baffle is used, then the device structure is simple and easy to manufacture, but the fluid flow becomes non-uniform with significant stagnation and recirculation zones causing high pressure head loss
Solution Approach 1:
The patent applies curved surfaces instead of flat surfaces by providing a suction diffuser body with a curved interior cavity and a curved cover plate. The curved geometry eliminates stagnation and recirculation zones by promoting smooth fluid flow throughout the diffuser, thereby reducing pressure head loss while maintaining manufacturing feasibility through standard forming processes.
Solution Approach 2:
The patent introduces a three-dimensional contoured flow conditioning arrangement that extends into the diffuser interior cavity. This volumetric feature, rather than a two-dimensional baffle, creates multiple flow paths and directs fluid uniformly toward the outlet, eliminating dead zones and reducing pressure head loss without significantly complicating manufacturing.
2Device complexity
If a conventional suction diffuser with a simple baffle arrangement is used, then the device complexity is low, but the fluid flow uniformity at the pump inlet is insufficient
Solution Approach 1:
The curved interior cavity and curved cover plate work together to guide fluid flow smoothly from the inlet to the outlet. The continuous curved surfaces eliminate sharp corners and abrupt changes that create recirculation zones, ensuring uniform fluid distribution at the pump inlet while maintaining a relatively simple single-piece or two-piece construction.
Solution Approach 2:
The contoured flow conditioning arrangement acts as an intermediary element between the simple diffuser body and the pump inlet. This intermediate structure conditions the fluid flow by directing it uniformly toward the outlet, bridging the gap between simple device geometry and the requirement for uniform flow without significantly increasing overall device complexity.
3Loss of energy
If inwardly contoured flow conditioning surfaces are added to the suction diffuser, then fluid flow uniformity improves and pressure head loss reduces, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The curved surfaces are designed to be manufacturable using standard forming processes such as stamping or molding. The curvature radii are chosen to be practical for fabrication, and the overall geometry maintains a simple diffuser body structure, thereby achieving flow improvement without excessive manufacturing complexity.
Solution Approach 2:
The flow conditioning features are integrated into the diffuser body and cover plate structures themselves rather than being separate components. The curved interior cavity and curved cover plate are formed as integral parts of the diffuser assembly, reducing the number of parts and simplifying manufacturing while still providing the beneficial flow conditioning effects.
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 solution results in a more uniform fluid flow into the pump, reducing pressure head loss and enhancing the overall efficiency of the pump-suction diffuser system.
Implementation Method 1
a flow conditioning portion having at least one inwardly contoured surface, configured to extend into the interior cavity, diffuse the incoming fluid passing from the inlet into the interior cavity
Data Source
Figure 1~2b
Figure 2c~3b
Figure 2d~2e
AI summary
A suction diffuser or arrangement is provided featuring a main suction diffuser body and a flow conditioning arrangement. The main suction diffuser body is configured with an inlet to receive an incoming fluid flow, an interior cavity to receive the incoming fluid from the inlet, and an outlet to receive the incoming fluid from the interior cavity and provide an outgoing fluid. The flow conditioning arrangement is configured in relation to the inlet and also comprises a flow conditioning portion having at least one inwardly contoured surface, configured to extend into the interior cavity, diffuse the incoming fluid passing from the inlet into the interior cavity, and provide a flow conditioning that produces a uniform flow of the outgoing fluid by directing the incoming fluid towards the outlet, based at least partly on a contoured design corresponding to the at least one inwardly contoured surface.