Valuable information about our software solutions, in bite-sized pieces.
When the ship is moored (no speed), how do you calculate the propeller thrust with different RPM? How would one prepare a sample for this scenario?
It is important to understand that each entered speed will have a single associated RPM. So, I would make a project with a collection of speeds that are different, but very close to zero (e.g., 0.001, 0.002, …). In this way the speeds are effectively the same. Then set the Propulsion “Analysis type” selection to Defined. Enter the range of RPMs into the now enabled RPM column, and calculate. One note: if the objective is to use this to find the RPM that delivers the maximum thrust within the engine limits, this solution can be explicitly conducted using the Towing option (rather than Defined).
PropExpert is more than just a pitch calculator! When PropExpert sizes propellers, it is balancing thrust, power, cavitation, and tip speeds to ensure an efficient and well-matched propeller.
PropCad generates 3D propeller models very quickly and provides a great environment to edit the design. There are also tools for adding shrinkage and grindstock for castings and molds.
Repeat customers? Did you know that PropExpert includes a project library that manages all of your propeller sizings, clients, and job data? It’s true! Save time by having your previous sizings in an easy to use, searchable project library.
PropCad allows you to customize 2D propeller drawings from your 3D designs.
NavCad can be used to generate KT/KQ curves for actuator disks which account for oblique flow and can increase the fidelity of a CFD simulation without increased computational cost. More accurate thrust and torque figures lead to more accurate predictions of vessel speed and trim. Count on NavCad for accurate results
Adding cup to an existing propeller design is easy with PropCad’s parametric design tools. The added cup group enables easy control of cup style, height, and distribution from root to tip.
Establishing benchmarks for vessel and propulsor performance can help ensure that costly CFD runs aren’t going awry. If results are not in line with the expected values, we can halt the calculation and troubleshoot the simulation before it’s too late.
PropCad can help you recreate a propeller design from a 3D scan of a single blade. It also is great for extracting the design data from a propeller (similar to reverse engineering). Once the data is in PropCad, it can easily be altered.
NavCad’s “Method Expert” utility includes a data check to help determine if a hull may be too heavy to plane.
Both PropElements and NavCad (Premium Edition) also have a scripting API and the ability to act as a calculation server for optimization scenarios with executive tools such as Excel, Matlab, Simulink, or your own codes, for example. This is valid for any vehicle optimization.
PropElements is a wake-adapted component propeller design/analysis tool. It has special UV-relevant features for estimating radial inflow for axisymmetric bodies, as well as calculation settings for low blade area propellers.
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