"constantly accelerate" is correct and usable in written English.
It is an action verb or a verb phrase used to indicate that something is speeding up or increasing at a steady rate. For example, "The economy has been in a constant state of acceleration for the past few years."
The flight trajectories we recorded were never steady: rather they were constantly accelerating or decelerating, with maximum tangential accelerations and maximum centripetal accelerations on the order of 3 g.
The reason is that it is being constantly accelerated by gravity.
This is the same line of thinking that, without substantiation, claims that technology's pace is constantly accelerating (perhaps towards a 'singularity', a sort of technological End Times).
The movie, which was directed by Marc Forster and was written by Matthew Michael Carnahan and a host of collaborators, evokes the hectic density of modern life; it stirs fears of plague and anarchy, and the feeling that everything is constantly accelerating.
On the rest of the album, Mystikal goes from a conspiratorial whisper to a vein-popping scream in the course of a few words, and he's constantly accelerating and decelerating his delivery.
In the lab, Mr. Brout learned to analyze the huge amount of data that enabled Dr. Riess to determine that the universe was expanding at a constantly accelerating rate.
Be that as it may, the last word on Hadid should be Koolhaas's assessment of her as her tutor at the AA: "Zaha's performance during the fourth and fifth years was like that of a rocket that took off slowly to describe a constantly accelerating trajectory.
It makes sense that television is responding so quickly, and not only because the medium's pace is constantly accelerating (the "Elián González" movie landed on television less than a year after Elián landed in Florida) or because 24-hour cable news and the Internet are prodding the networks along.
The essence of his theory is that education will be the major industry of the future, for automation increasingly will make the old concept of work obsolete and everyone will spend more and more of his non-leisure time in research and reëducation to keep up with a constantly accelerating technology.
