The phrase "a number of conventional" is correct and usable in written English.
It can be used when referring to several traditional or established methods, practices, or ideas.
Example: "In the study, a number of conventional approaches were analyzed to determine their effectiveness."
Alternatives: "several traditional" or "various established".
Translation between the vector and raster data models is possible using a number of conventional methods, though none is without error.
The execution of the responsibilities of the welding engineer takes place at the interface of a number of conventional technologies.
But the fear remains that the international financial system is simply replacing a number of conventional emerging-market debt bombs with an advanced-country nuke.
A number of conventional situation comedies -- about nuclear families encountering child-rearing challenges and battle-of-the-sexes conflicts between parents -- have emerged from years in the ratings wilderness to reclaim high rankings in the weekly Nielsen poll.
This isn't to say that a number of conventional mass-entertainment comedy routines aren't funny, or that there won't always be a place, or a need, for a clown simply to play a clown.
Apart from a number of conventional varieties of packaging, the terms are used for technologically advanced systems, such as microelectronics, computer application, and nanotechnology.
The region does support a number of more conventional cultural institutions, including the Las Vegas Art Museum, Las Vegas Natural History Museum, and Nevada State Museum and Historical Society.
I have just been reading, in this careful book of a most intelligent & learned man, a number of flat conventional words & sentences.
Over the years I've seen a number of more conventional productions that wrestled with the play's demands – its multiplicity of scenes and rhetorical richness.
And the budget that you've been discussing, of course, does not include missile defense, does not include a number of the conventional weapons transformations that your team even produced here today is going to be working on.
He played a number of relatively conventional stage roles and in 1959 met Judith Molina and Julian Beck and joined their Living Theater.
