Interesting topic.
I found that water become more conductive after protonation and I conducted some experiments to further understand that in order to be applied as power source and pre-electrolysis process for my actual product line.
I have posted on You Tube some of those experiments but not rise interest! As soon I add word "Meyer" one of my uploads become interesting!

What is funny that one image presented here by one member actually belongs to me!
Is a frame from one short movie posted on You Tube and part of one of my silly experiments with HV and purified water.
Not count on it! The gas produced is insignificant for the power consumed - a good electrolysis cell can better use that power!
What I found in that experiment was that a short-cut on the cell may increase the gas production - at 220 V AC I get nice gas and - sure - bust the fuses!
I tested also ceramic ozone generators to protonate the water with different result then normal cell, posted also on You Tube!
I tested Aluminum electrode - it act as diode under AC ...
I use the term Protonation and not ionization since last one is associated higher voltage applied to subject, usually gases.
Water not need so high voltage to be ionized unless one electrode is not coated with a dielectric layer as glass or quartz as was suggested here.
The product I will release will use that effect of protonation.
I suppose that a simple water injection system with such a gas generator attached may be a solution for a fuel saver if purified / distilled water can be used and gas volume will be at least in the range of 1-5 LPM for acceptable power input either low voltage or high voltage.
If injectors/ nozzle can be fixed on EGR ( where is available or similar arrangement where is not present ) gases flow is possible to trigger the Nitrogen reaction described here as possible fuel replacement without any extra electric field.
This aspect of the use of hot exhaust gases combined with Oxy-Hydrogen gases from different types of generators is common to most water as fuel working projects I know.
I will run a test and inject mild Borax electrolyte and Oxy-Hydrogen gas mixture - I use Borax for some time as KOH/NaOH replacement due the compatibility with engine parts, good lubricity and rust protection can provide - In any form water as fuel need a solution to this aspect.
I will run a test injecting Acidic water ( H3O) provided by an water ionizer ( as part of my product ) and Oxy-Hydrogen mixture of gases produced by a normal electrolytic cell as separate fluids.
I will upload the results on You Tube. To who it may concern, please indicate the source if use other people's work!