Industrial Ejector With Inclined Nozzle Opening
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Solution Overview
Problem
Conventional industrial ejectors experience a decline in suction performance when the pressure of the primary flow increases, failing to efficiently inhale secondary fluid beyond a certain pressure threshold, and often do not reach the desired choke state.
Innovation Solution
The industrial ejector design incorporates a Laval nozzle with a first channel and a tubular main body, featuring a second channel oriented perpendicular to the first channel, where the opening of the first channel is inclined downstream, allowing the pressure-dropped fluid to flow towards the second channel, enhancing suction performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the pressure of the primary flow is increased, then the suction flow rate of the secondary flow increases, but the suction performance deteriorates
Solution Approach 1:
The patent applies local quality by creating a specific geometric configuration at the junction between the first and second channels. The inclined opening (with angle α between 0-45 degrees) modifies the local flow characteristics where the primary flow enters the secondary channel, enabling efficient suction across a broader pressure range without deteriorating suction performance
Solution Approach 2:
The patent introduces a new geometric dimension by inclining the opening of the first channel at an angle α relative to the axial direction. This angular dimension ( previously absent in conventional ejectors) allows the primary flow to effectively entrain secondary flow across a wider pressure range, resolving the contradiction between suction flow rate and suction performance
2Quantity of substance
If the pressure of the primary flow is increased beyond Pss, then the suction flow rate of air decreases, but the suction performance cannot be maintained
Solution Approach 1:
The patent changes the geometric parameters of the channel configuration, specifically the inclination angle α of the first channel opening. This parameter modification enables the ejector to maintain stable suction performance across a broader pressure range, preventing the sharp decline in suction performance that occurs in conventional ejectors when primary flow pressure exceeds Pss
3Reliability
If the opening of the first channel is inclined toward the first side, then the suction performance is improved, but the structural complexity increases
Solution Approach 1:
The patent applies local quality by creating a specific geometric configuration at the junction between the first and second channels. The inclined opening (with angle α between 0-45 degrees) modifies the local flow characteristics where the primary flow enters the secondary channel, enabling efficient suction across a broader pressure range without deteriorating suction performance
Solution Approach 2:
The patent introduces asymmetry in the channel geometry by inclining the opening of the first channel at an angle α relative to the axial direction. This asymmetric configuration optimizes the flow interaction between primary and secondary streams, improving suction performance while adding only minimal structural complexity
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
This configuration improves suction performance by efficiently inhaling secondary fluid across a wider range of primary flow pressures, potentially reaching the choke state, thereby optimizing fluid flow rates.
Implementation Method 1
An industrial ejector is a fluid pump that ejects fluid such as water vapor from nozzles and inhales another fluid using negative pressure of the nozzle exit
Implementation Method 2
a Laval nozzle in which a first channel which has a throat and along which fluid flows in a first direction is formed
Implementation Method 3
pressure of the fluid drops at the downstream side of the throat in the first channel. Since the opening of the first channel is inclined toward the first side as it goes toward the downstream side, the fluid in which pressure has dropped flows toward the first side as it goes toward the downstream side
Data Source
AI summary
An industrial ejector includes: a Laval nozzle in which a first channel which has a throat and along which a fluid flows in a first direction is formed; and a main body which is formed in a tubular shape, in which the Laval nozzle disposed therein is fixed to a part of an inner surface thereof, and in which a second channel is formed between the rest of the inner surface and the Laval nozzle. The second channel is disposed at a first side with respect to the first channel in a second direction perpendicular to the first direction. An opening is obliquely cut and formed in an end of the first channel at a downstream side and inclined toward the first side in the downstream direction and then toward the second channel.