This versus thread never stated the location in which this battle was to take place. So I have taken the liberty of having it in 3 different universes.
1) DC - where the SF, IMP & all the other Flash BS "exists".
Result Flash wins but not as easily as some like to think. WW took Zoom's best shots & Hulk is a lot more durable than her. So it could be inferred that Hulk would not be beaten that easily or quickly.
2) Marvel - where there is no Speed Force. Hulk kills Flash with a sneeze.
3) Neutral - Combatants only have any powers that they naturally possess. Oops that means one mean green dude and a puny human in red tights (its the Speed Force that is all powerful not the person known as the Flash.) Hulk wins again.
That's 2 - 1 to the Hulk