Download of DeltaEC 6.3.11 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions of the DeltaEC are 6.3 and 6.2. DeltaEC relates to Education Tools. We recommend checking the downloaded files with any free antivirus. This free software is an intellectual property of Los Alamos National Laboratory. Commonly, this program's installer has the following filename: DeltaEC.exe.
From the developer:
DeltaEC is a free program that can predict how a given thermoacoustic apparatus will perform and it allows the user to design an apparatus to achieve the desired performance. DeltaEC is useful to researchers in physical acoustics and especially thermoacoustics.
You may want to check out more software, such as SatCalc, MathMatic or MemBrain, which might be related to DeltaEC.