Searching for stationary stable solutions of Euler's equation

In this paper an attempt of finding new stationary stable solutions of the Euler equation is presented.
We will look into solutions of the sinh-Poisson equation, which lead to stationary stable solutions of the Euler equation.
New solutions can be generated by applying a Backlund transformationn method on known solutions of the sine-Gordon equation which is related to the sinh-Poisson equation. This method is applied to a circular symmetric solution. Unfortunately we are not able to present any new circular symmetric solutions.