How to make this "explosive smoke" effect?

At a quick look it just looks like yours is the wrong color, moving too slowly and there's not enough of it.

remember you don't have to achieve the effect with a single layer or instance of particular

I would create a few more instances of what you did tweak the setting s tiny bit on each

(pre-comp and add a bit of turbulent displace, time remapping to speed it up, color correction & fan the pre-comps out so they cover the entire corner of the screen)

You might even get away with some free stock footage of smoke rather than messing particular although you did a really nice job creating

a smokey look yourslef.

I think you're on the right track..you just need to get a little creative with what you've already got