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Marine Propeller Cavitation Number & Burrill Blade Area Ratio Calculator

Easily calculate and compute marine propeller cavitation number & burrill blade area ratio calculator with accurate equations, live formulas, and expert guidance.

Water depth from free surface down to propeller shaft hub.

Water speed approaching propeller.

Outer diameter.

Operating rotational speed.

Total forward thrust force.

Calculated Result
0.41 ratio

Minimum BAR

Minimum BAR

0.41 ratio

Minimum Blade Area Ratio Bar

0.41

Cavitation Number Sigma07

0.548

Relative Speed At07 R Blade M Per S

23.5

Burrill Thrust Loading Limit

0.242

0.41 — ratio

Calculation Breakdown

  1. Applied FormulaApplies the Burrill cavitation criterion to determine the local blade section cavitation number (σ_0.7) and minimum allowable Expanded Blade Area Ratio (BAR) to prevent erosive sheet cavitation.\sigma_{0.7} = \frac{p_{stat} - p_v}{\frac{1}{2} \rho v_{0.7}^2}, \quad \tau_c \le 0.035 + 0.28 \sqrt{\sigma_{0.7}}

Propeller Cavitation Burrill Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.30.50.81.0Minimum BAR

What Is the Marine Propeller Cavitation Number & Burrill Blade Area Ratio Calculator?

This tool computes marine propeller cavitation number & burrill blade area ratio calculator with high precision arithmetic.

How Does the Marine Propeller Cavitation Number & Burrill Blade Area Ratio Calculator Work?

Applies the Burrill cavitation criterion to determine the local blade section cavitation number (σ_0.7) and minimum allowable Expanded Blade Area Ratio (BAR) to prevent erosive sheet cavitation.

Marine Propeller Cavitation Number & Burrill Blade Area Ratio Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

σ0.7=pstat−pv12ρv0.72,τc≤0.035+0.28σ0.7\sigma_{0.7} = \frac{p_{stat} - p_v}{\frac{1}{2} \rho v_{0.7}^2}, \quad \tau_c \le 0.035 + 0.28 \sqrt{\sigma_{0.7}}

Applies the Burrill cavitation criterion to determine the local blade section cavitation number (σ_0.7) and minimum allowable Expanded Blade Area Ratio (BAR) to prevent erosive sheet cavitation.

How to Use the Marine Propeller Cavitation Number & Burrill Blade Area Ratio Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Marine Propeller Cavitation Number & Burrill Blade Area Ratio Calculator Example

Input Values:

shaftImmersionDepthMeters:5.5
speedOfAdvanceKnots:16
propellerDiameterMeters:4.8
shaftSpeedRpm:125
totalThrustKiloNewtons:480
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required ratio.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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