Bivariate Normal Reservoir Desilting Funnel for Clogging Prevention
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Solution Overview
Problem
Sediment accumulation in reservoirs reduces their capacity and affects navigation, and existing desilting methods fail to effectively control the shape and size of scouring funnels, leading to inefficiencies in sediment removal.
Innovation Solution
A reservoir desilting device with a sediment inlet funnel having a bivariate normal surface and a sediment transport pipeline with an inverse hyperbolic geodesic curve, designed to ensure smooth flow and alignment with gravity for efficient sediment discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional desilting bottom hole is used, then the structure is simple, but the scouring funnel shape and size cannot be controlled and the area is small, resulting in insufficient desilting effect
Solution Approach 1:
The patent applies parameter changes by using a bivariate normal distribution function to precisely control the shape and size parameters of the scouring funnel. By adjusting parameters such as standard deviation σx and σy, and correction factor k, the funnel's geometric characteristics are optimized to maximize sediment removal efficiency while maintaining structural feasibility.
Solution Approach 2:
The patent employs curved surfaces by designing the funnel with a bivariate normal distribution shape rather than a conventional conical or cylindrical structure. This curved geometry allows for smoother flow paths, better sediment capture, and more effective scouring action while distributing the structural complexity across the curved surface.
2Reliability
If the funnel surface is not smooth, then the structure is simpler to construct, but sediment accumulates during desilting causing inlet clogging
Solution Approach 1:
The patent uses a smooth bivariate normal distribution surface that is mathematically continuous and differentiable everywhere. This smooth curvature prevents sediment accumulation by eliminating sharp edges and flat surfaces where particles could get trapped, thereby preventing inlet clogging while the surface itself remains constructible using standard engineering methods.
3Productivity
If the pipeline shape does not align with gravity, then the construction is simpler, but the siphon effect is weakened and sediment discharge is inefficient
Solution Approach 1:
The patent applies equipotentiality by designing the pipeline along an inverse hyperbolic geodesic curve that aligns with the gravitational field. This curvature ensures that the pipeline follows the natural flow path of water under gravity, maximizing the siphon effect and sediment discharge efficiency without requiring additional energy input or complex active control systems.
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 device prevents sediment accumulation and ensures smooth sediment transport, enhancing desilting efficiency by preventing inlet clogging and optimizing sediment passage through the dam.
Implementation Method 1
a bivariate normal surface is used for the design of the sediment inlet funnel so that the funnel surface is smooth everywhere and the sediment is less likely to be accumulated during desilting
Implementation Method 2
the sediment transport pipeline with an inversehyperbolic geodesic curve has a surface smooth everywhere, and the inlet and the outlet are consistent with the direction of gravity to strengthen the siphon effect
Implementation Method 3
the inlet and the outlet are consistent with the direction of gravity to strengthen the siphon effect
Data Source
AI summary
The present disclosure provides a reservoir desilting device having a funnel with a bivariate normal surface, which belongs to the technical field of water conservancy projects. The device includes a sediment inlet funnel and a sediment transport pipeline, where the sediment inlet funnel is located in a sediment accumulation area in a reservoir, the sediment transport pipeline is laid on a river bed of the reservoir, a bottom of the sediment inlet funnel is connected to one end of the sediment transport pipeline, and the other end of the sediment transport pipeline penetrates out of a bottom of a dam; and the sediment transport funnel has a shape of a bivariate normal surface, the sediment transport pipeline has a shape of an inverse hyperbolic geodesic curve, and the sediment transport pipeline is provided with a valve.