3D Special-Shaped Jet Nozzle for Narrow-Band Irrigation
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Solution Overview
Problem
Current sprinkling irrigation systems, particularly mobile sprinkling irrigation, suffer from overspray, spray leakage, and difficulty in achieving uniform water distribution, leading to soil and crop damage, and lack a narrow-band spray field nozzle design suitable for both fixed and mobile irrigation modes.
Innovation Solution
A three-dimensional special-shaped jet nozzle with a cylindrical-conical coupling structure, featuring V-shaped and strip-shaped slots, is designed using gas-liquid two-phase flow theory and computational fluid dynamics (CFD) to create a narrow-band spray field, allowing for high uniformity and adjustable irrigation range without rotating mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If mobile sprinkling irrigation is used, then irrigation coverage area is improved, but spray uniformity deteriorates due to overspray in overlapping areas and spray leakage at edges
Solution Approach 1:
The nozzle is divided into multiple independent slot structures (V-shaped slots and strip-shaped slots) that separately control different aspects of the spray pattern. The V-shaped slots generate fan-shaped jets for near-range coverage while strip-shaped slots create beam-shaped jets for far-range coverage, segmenting the spray function to eliminate overlapping overspray and edge leakage
Solution Approach 2:
Different regions of the nozzle produce different jet characteristics tailored to specific irrigation needs. The bottom and front portions create fan-shaped jets for wide near-range distribution, while the upper half portion creates beam-shaped jets for targeted far-range penetration, optimizing local spray quality for each zone
2Area of stationary object
If rocker-arm type sprinklers with circular outlets are used, then spray field coverage is improved, but water use efficiency deteriorates due to lack of narrow-band spray capability
Solution Approach 1:
The nozzle transitions from traditional circular outlet geometry to a three-dimensional special-shaped slotted structure with V-shaped and strip-shaped slots arranged in specific spatial configurations. This dimensional transformation enables coupled fan-shaped and beam-shaped jet modes that concentrate water delivery into a narrow band, reducing lateral dispersion and improving water use efficiency
3Manufacturing precision
If fixed sprinkling irrigation with circular spray field is used, then spray uniformity is improved, but adaptability to different farmland configurations deteriorates
Solution Approach 1:
The nozzle design enables dynamic adaptation to different irrigation scenarios through its coupled jet modes. The same nozzle structure can produce fan-shaped jets for near-range wide coverage or beam-shaped jets for far-range targeted irrigation, allowing the system to adapt to various farmland configurations and crop arrangements without sacrificing spray uniformity
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 nozzle enables efficient, water-saving irrigation with reduced soil disturbance, adjustable irrigation intensity, and improved uniformity, suitable for both fixed and mobile sprinkling systems, while reducing research and development costs through optimized structural parameters.
Implementation Method 1
a method based on a gas-liquid two-phase flow theory and computational fluid dynamics (CFD)
Implementation Method 2
computational fluid dynamics (CFD)
Data Source
AI summary
Disclosed is a design method for a three-dimensional special-shaped jet nozzle used in the field of water-saving irrigation in farmland. According to a method based on a gas-liquid two-phase flow theory and computational fluid dynamics (CFD), a fan-shaped jet mode and a beam-shaped jet mode are coupled according to a certain area ratio and velocity ratio, which enables a cylindrical-conical coupling structure to be presented all the way from an inlet to an outlet of the nozzle, and a jet orifice is optimally designed into a three-dimensional special-shaped slotted structure; along a flowing direction of the jet orifice, V-shaped slots are formed in bottom and front portions of a midperpendicular plane, where a fan-shaped jet capable of forming a near-range water body prevails, and a strip-shaped slot is formed in an upper half portion of the midperpendicular plane, where a beam-shaped jet capable of forming a far-range water body prevails; and the V-shaped slots and the strip-shaped slot promote the formation of a narrow-band range S in a synergistic manner due to smooth joint transition therebetween. The present disclosure is particularly suitable for farmland sprinkling irrigation operations in non-planted areas such as tractor roads and field roads, and has the unique advantages of saving water and energy, and not rolling soil and crop seedlings.