Flexcom 2022.1.1

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Flexcom 2022.1.1

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Overview

The following faults are present in Flexcom 2022.1.1. More detailed information on each fault is provided in the following sections.

No

Issue

Severity

1

Application of wind loads ignores turbine yaw

Major

2

Wind Field Generator app can truncate file names occasionally

Minor

3

Flexcom's GUI requires a license to open

Minor

4

Element convected axes display

Minor

Detailed Information

Issue 1: Application of wind loads ignores turbine yaw

Related Topics: Wind Turbine Modelling

Description: Wind loads are not correctly rotated from the AeroDyn coordinate system to the Flexcom coordinate system. This means that turbine yaw is not taken into account, and the windward force always acts in a direction which is aligned with the Global Y axis in Flexcom. Wind turbine models in Flexcom (e.g., the standard examples shipped with the software) have the turbine initially facing along the negative Global Y axis (a prerequisite for initial alignment of AeroDyn and Flexcom coordinate systems), with the turbine typically facing the dominant wind direction. So if you are considering wind loading from a single direction only, the global response will be correct. However if you are applying wind from different directions, and using ServoDyn to rotate the turbine to face the oncoming wind, then the global response will be incorrect

Workaround: There is no workaround, so you are advised to upgrade to Flexcom 2022.1.2 or later.

Issue 2: Wind Field Generator app can truncate file names occasionally

Related Topics: Wind Field Generator

Description: The naming convention for generated files is controlled by the File Name Pattern input. If you using decimal places in your file names (e.g. wind speed = 32.85m/s), the WFG app can truncate the file names. This can cause confusion if you have several files with similar names.

Workaround: Contact Wood if you experience issues and we will provide you with a new WFG app which you can install on your machine.

Issue 3: Flexcom's GUI requires a license to open

Related Topics: Licensing Options

Description: Flexcom's user interface is designed to operate without a license, so tasks like model building and post-processing can be done without occupying a license seat. The license should only be required when performing numerical simulations. However, a bug in Flexcom 2022.1.1 means that the Flexcom GUI will not open without taking a license seat from the available pool.

Workaround: Use a previous version of Flexcom if you need to use the GUI without a license.

Issue 4: Element convected axes display in Model View

Related Topics: Model View

Description: The local convected axes displayed in the Model View is incorrect, as the user interface is incorrectly reading the relevant data from the database (it is mixing up rows and columns of the orientation matrix).

Workaround: Use the *PRINT keyword to manually examine the convected axes instead.