Movable Probe for Impact Pressure and Acoustic Testing
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Solution Overview
Problem
Existing measuring devices in fluid-flow machines, such as aircraft engines, interfere with flow patterns during acoustic tests, leading to inaccurate results and require lengthy setup times for impact pressure measurements, increasing development costs.
Innovation Solution
A movable tubular probe device that can be actuated between two operating states, allowing for impact pressure measurements without affecting flow patterns, enabling seamless transition between measurement and acoustic testing without device removal or reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measuring device is arranged in the outer area of flow-guiding devices for impact pressure measurement, then impact pressure can be measured, but the measuring device affects the flow in the flow cross-section and falsifies acoustic test results
Solution Approach 1:
The probe device is designed to be movable between a first operating state (protruding from the flow-guiding device for impact pressure measurement) and a second operating state (retracted into the flow-guiding device for acoustic testing). This dynamic positioning allows the measuring device to minimize its impact on flow patterns during acoustic tests while enabling accurate impact pressure measurements when needed.
2Object-affected harmful factors
If the measuring device is removed before every acoustic test to prevent flow interference, then accurate acoustic test results can be obtained, but setup times increase and development costs rise
Solution Approach 1:
The movable probe device eliminates the need for complete removal and reinstallation between test types. The probe can be quickly repositioned between operating states, significantly reducing setup time compared to full removal and reinstallation, while still preventing flow interference during acoustic testing.
Solution Approach 2:
The measuring device is designed to serve multiple functions: it can perform impact pressure measurements when protruding and allow acoustic testing when retracted. This multi-functionality eliminates the need for separate measuring devices for different test types and reduces setup time between test sequences.
3Measurement precision
If the probe device is held in a fixed position for impact pressure measurement, then measurement can be performed, but the probe continuously affects flow patterns and cannot be used for acoustic testing
Solution Approach 1:
The probe device transitions from a fixed position design to a movable design with two distinct operating states. This allows the system to adapt between impact pressure measurement mode (protruding) and acoustic testing mode (retracted), providing both measurement precision and test versatility.
Data Source
AI summary
A measuring device having at least one at least approximately tubular probe device, by means of which an impact pressure, a total pressure or a dynamic pressure of a flow can be determined, and which is designed movable at least between a first operating state and a second operating state, where the probe device can be moved by an actuating unit in a controlled manner between the first operating state and the second operating state and held in said states.