Which outcome arises when a hydrofoil's cavitation number drops below the critical threshold?

💡 Explanation

When the cavitation number drops below the critical threshold, extensive cavitation occurs because pressure near the foil's surface falls sufficiently to vaporize the liquid, disrupting the flow and causing loss of lift & increased drag. Therefore, decreased lift & increased drag results, rather than increased lift, efficiency or stability which require attached flow.

• Which control issue escalates when signal lag rises in a robot's multi-joint arm?
• Which risk increases when thermal drift affects encoders?
• Which risk increases when cavitation occurs within the hydraulic actuator of an robotic arm?
• Which adverse effect accompanies high-frequency switching in pulse-width modulation valves of servo-hydraulic systems?
• Which risk accelerates pitting corrosion when injecting seawater into offshore oil pipelines?
• Which outcome occurs in a hydraulic system when a gas-charged accumulator's diaphragm ruptures during peak demand?